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American Tactical Imports Mil-Sport Upper 5.56 Stainless Steel Barrel and KeyMod Handguard

American Tactical Imports Mil-Sport Upper 5.56 18in Stainless Steel Barrel, 15in Keymod Handguard, ATI15MS18KM
American Tactical Imports Mil-Sport Upper 5.56 16in Stainless Steel Barrel, 13in KeyMod Handguard, ATI15MS16KM
American Tactical Imports Mil-Sport Upper 5.56 18in Stainless Steel Barrel, 15in Keymod Handguard, ATI15MS18KM
1 of 2 images
American Tactical Imports Mil-Sport Upper 5.56 18in Stainless Steel Barrel, 15in Keymod Handguard, ATI15MS18KM
American Tactical Imports Mil-Sport Upper 5.56 16in Stainless Steel Barrel, 13in KeyMod Handguard, ATI15MS16KM
2 of 2 images
American Tactical Imports Mil-Sport Upper 5.56 16in Stainless Steel Barrel, 13in KeyMod Handguard, ATI15MS16KM

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Questions & Answers

Product Discontinued by Manufacturer

American Tactical Imports Mil-Sport Upper 5.56 Stainless Steel Barrel and KeyMod Handguard has been discontinued by American Tactical Imports and is no longer available. Our product experts have helped us select these available replacements below.You can also explore other items in the Gun Parts, AR 15 Parts, Rifle Parts, AR15 Upper Receivers yourself to try and find the perfect replacement for you!

ATTENTION! We currently do not ship this product to P.O. Boxes, AK, CA, CT, DE, HI, MA, NJ, NY, U.S. Territories, or select Colorado locations. Please see our policies for more information or a detailed list of locations.

Product Info for American Tactical Imports Mil-Sport Upper 5.56 Stainless Steel Barrel and KeyMod Handguard

Fabricated to be regarded as a great item for almost anybody, we are positive you will enjoy the American Tactical Imports Mil-Sport Upper 5.56 Stainless Steel Barrel and KeyMod Handguard.image

These AR15 Upper Receivers through the professional product specialists at American Tactical Imports are made working with heavy duty and dependable components, as a way to supply you with a product which is going to be powerful for quite some time. Manufactured utilizing some of the best accessible materials and engineering, these special AR15 Upper Receivers from the product specialists at American Tactical Imports will last an incredibly long time.

American Tactical Imports has been developing high quality merchandise for a very long time, and the American Tactical Imports Mil-Sport Upper 5.56 Stainless Steel Barrel and KeyMod Handguard is their very own means of demonstrating exactly how much they care.

Right here at OpticsPlanet, we ensure that it is our responsibility to get the most suitable product for all your needs, and exhibiting the American Tactical Imports Mil-Sport Upper 5.56 Stainless Steel Barrel and KeyMod Handguard is a thing that we are delighted to offer.

Package Contents:

  • American Tactical Imports Mil-Sport Upper 5.56 Stainless Steel Barrel and KeyMod Handguard

Ammunition

1–40 / 40
Previous
Best Rated
PMC Ammunition X-TAC, 5.56x45mm NATO, 55 grain, Full Metal Jacket, Brass, Centerfire Rifle Ammo, 20, 556X
PMC Ammunition X-TAC, 5.56x45mm NATO, 55 grain, Full Metal Jacket, Brass, Centerfire Rifle Ammo, 20, 556X
(68)
List: $15.99 (Save 31%)
$10.99
$0.55/Round
Best Rated
PMC Ammunition X-TAC Light Armor Piercing 5.56x45mm NATO 62 Grain Brass Cased Centerfire Rifle Ammunition
PMC Ammunition X-TAC Light Armor Piercing 5.56x45mm NATO 62 Grain Brass Cased Centerfire Rifle Ammunition
(115)
As Low As (Save Up to 21%)
$11.89
$0.59/Round
See all 2 models
PPU 5.56x45mm NATO 0 grain Brass Cased Blank Ammo, 20 Rounds, PPB556
PPU 5.56x45mm NATO 0 grain Brass Cased Blank Ammo, 20 Rounds, PPB556
List: $22.49 (Save 29%)
$15.99
$0.80/Round
Best Rated
Hornady BLACK 5.56x45mm NATO 75 Grain InterLock HD SBR Centerfire Rifle Ammunition
Hornady BLACK 5.56x45mm NATO 75 Grain InterLock HD SBR Centerfire Rifle Ammunition
(27)
As Low As (Save Up to 14%)
$31.49
$1.57/Round
See all 2 models
Best Rated
Winchester USA 5.56x45mm NATO 62 grain Green Tip M855 Full Metal Jacket Boat Tail FMJBT Brass Centerfire Rifle Ammunition
Winchester USA 5.56x45mm NATO 62 grain Green Tip M855 Full Metal Jacket Boat Tail FMJBT Brass Centerfire Rifle Ammunition
(134)
As Low As (Save Up to 54%)
$12.99
$0.65 - $0.82/Round
See all 7 models
On Sale
Hornady Superformance 5.56x45mm NATO 75 grain Boat-Tail Hollow Point Match Brass Cased Centerfire Rifle Ammo, 20 Rounds, 81264
Hornady Superformance 5.56x45mm NATO 75 grain Boat-Tail Hollow Point Match Brass Cased Centerfire Rifle Ammo, 20 Rounds, 81264
(8)
List: $41.40 (Save 28%)
$29.69
$1.48/Round
Best Rated
Winchester USA 5.56x45mm NATO 55 grain Ball (M193) Full Metal Jacket Brass Centerfire Rifle Ammunition
Winchester USA 5.56x45mm NATO 55 grain Ball (M193) Full Metal Jacket Brass Centerfire Rifle Ammunition
(147)
As Low As (Save Up to 25%)
$12.37
$0.62 - $0.78/Round
See all 6 models
Federal American Eagle 5.56x45mm NATO 55 Grain Full Metal Jacket Boat Tail Brass Cased Rifle Ammunition
Federal American Eagle 5.56x45mm NATO 55 Grain Full Metal Jacket Boat Tail Brass Cased Rifle Ammunition
As Low As (Save Up to 22%)
$67.49
$0.67 - $0.81/Round
See all 2 models
Best Rated
Hornady Frontier 5.56x45mm NATO 68 grain Boat-Tail Hollow Point Brass Cased Centerfire Rifle Ammo, 20 Rounds, FR310
Hornady Frontier 5.56x45mm NATO 68 grain Boat-Tail Hollow Point Brass Cased Centerfire Rifle Ammo, 20 Rounds, FR310
(15)
List: $19.60 (Save 13%)
$16.99
$0.85/Round
Best Rated
Barnes Vor-TxRifle Cartridges, 5.56x45mm NATO, TSX Boat Tail, 70 Grain, 20 - Rounds, *31191
Barnes Vor-TxRifle Cartridges, 5.56x45mm NATO, TSX Boat Tail, 70 Grain, 20 - Rounds, *31191
(14)
List: $43.99 (Save 10%)
$39.49
$1.97/Round
Newly Added
Atomic Ammunition Cycling Defense AD77 5.56x45mm NATO 77 grain Boat Tail Hollow Point Brass Cased Rifle Ammunition
Atomic Ammunition Cycling Defense AD77 5.56x45mm NATO 77 grain Boat Tail Hollow Point Brass Cased Rifle Ammunition
As Low As (Save Up to $13.01)
$32.99
$1.47 - $1.65/Round
See all 2 models
On Sale
Hornady Frontier 5.56x45mm NATO 55 Grain Brass Cased Full Metal Jacket Rifle Ammo, 250 Rounds, FR604
Hornady Frontier 5.56x45mm NATO 55 Grain Brass Cased Full Metal Jacket Rifle Ammo, 250 Rounds, FR604
List: $204.99 (Save 26%)
$152.29
$0.61/Round
First Breach 5.56 NATO 55 Grain Full Metal Jacket Boattail New C220 Brass Cased Rifle Ammo, 1000 Rounds, 50009
First Breach 5.56 NATO 55 Grain Full Metal Jacket Boattail New C220 Brass Cased Rifle Ammo, 1000 Rounds, 50009
(1)
List: $599.99 (Save 14%)
$513.50
$0.51/Round
Best Rated
Barnes Vor-TxRifle Cartridges, 5.56x45mm NATO, TSX Boat Tail, 62 Grain, 20 - Rounds, *31190
Barnes Vor-TxRifle Cartridges, 5.56x45mm NATO, TSX Boat Tail, 62 Grain, 20 - Rounds, *31190
(10)
List: $42.99 (Save 19%)
$34.79
$1.74/Round
PMC 556XBP Battle Pack 5.56 NATO 55 Gr Full Metal Jacket Boat Tail FMJBT
PMC 556XBP Battle Pack 5.56 NATO 55 Gr Full Metal Jacket Boat Tail FMJBT
(1)
List: $140.00 (Save $9.01)
$130.99
$0.65/Round
AmmoDyn 5.56x45mm NATO 55 grain Full Metal Jacket Brass Cased Rifle Ammo, 30 Rounds, PM-55655-30
AmmoDyn 5.56x45mm NATO 55 grain Full Metal Jacket Brass Cased Rifle Ammo, 30 Rounds, PM-55655-30
List: $26.95 (Save 18%)
$22.09
$0.74/Round
On Sale
Prvi Partizan RangeMaster, 5.56 NATO, 55 Grain, Full Metal Jacket, 20 Round Box PPRM5561
Prvi Partizan RangeMaster, 5.56 NATO, 55 Grain, Full Metal Jacket, 20 Round Box PPRM5561
List: $31.47 (Save 60%)
$12.49
$0.62/Round
Fort Scott Munitions, 5.56x45mm NATO, 55 grain, Copper Solid, Brass, Centerfire Rifle Ammo, 20, 556-055-SCV
Fort Scott Munitions, 5.56x45mm NATO, 55 grain, Copper Solid, Brass, Centerfire Rifle Ammo, 20, 556-055-SCV
List: $28.32 (Save 10%)
$25.39
$1.27/Round
Hornady Superfomance 5.56 Nato 55 Grain Copper Solid CX Brass Cased Centerfire Rifle Ammo, 20 Rounds, 812544
Hornady Superfomance 5.56 Nato 55 Grain Copper Solid CX Brass Cased Centerfire Rifle Ammo, 20 Rounds, 812544
(4)
List: $46.61 (Save 36%)
$29.69
$1.48/Round
Barnes Precision MatchRifle Cartridges, 5.56x45mm NATO, Match Burner Open Tip Match Boat Tail, 69 Grain, 20 - Rounds, *30846
Barnes Precision MatchRifle Cartridges, 5.56x45mm NATO, Match Burner Open Tip Match Boat Tail, 69 Grain, 20 - Rounds, *30846
List: $42.99 (Save 19%)
$34.79
$1.74/Round
Norma Range and Training 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Cased Rifle Ammo, 20 Rounds, 701701313
Norma Range and Training 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Cased Rifle Ammo, 20 Rounds, 701701313
List: $14.29
$13.49
$0.67/Round
PPU PPRM5561M 5.56X45 55 FMJBT RNGMSTR
PPU PPRM5561M 5.56X45 55 FMJBT RNGMSTR
List: $866.49 (Save $59.00)
$807.49
$0.81/Round
Winchester Lake City 5.56 MM M855 FMJ WIN 62 GR 50 Green Tip 50-20RD Box 1000 rds tot, WM855K Case
Winchester Lake City 5.56 MM M855 FMJ WIN 62 GR 50 Green Tip 50-20RD Box 1000 rds tot, WM855K Case
List: $869.99 (Save $54.00)
$815.99
$0.82/Round
PMC 556M55BP Battle Pack 5.56 NATO 62 Gr Light Armor Piercing LAP
PMC 556M55BP Battle Pack 5.56 NATO 62 Gr Light Armor Piercing LAP
(1)
List: $89.00 (Save 12%)
$77.99
$0.65/Round
Fort Scott Munitions .5.56 NATO 40 Grain CNC Machined Copper Brass Rifle Ammo, 20 Rounds, 556-040-SCV2
Fort Scott Munitions .5.56 NATO 40 Grain CNC Machined Copper Brass Rifle Ammo, 20 Rounds, 556-040-SCV2
List: $28.06 (Save $1.07)
$26.99
$1.35/Round
Best Rated
Barnes Precision 5.56x45mm NATO 85 grain Burner Open Tip Match Boat Tail Centerfire Rifle Ammo, 20 Rounds, *30848
Barnes Precision 5.56x45mm NATO 85 grain Burner Open Tip Match Boat Tail Centerfire Rifle Ammo, 20 Rounds, *30848
(5)
List: $70.88 (Save 39%)
$43.49
$2.17/Round
Best Rated
Hornady BLACK 5.56x45mm NATO 62 grain Full Metal Jacket Brass Cased Centerfire Rifle Ammo, 20 Rounds, 81263
Hornady BLACK 5.56x45mm NATO 62 grain Full Metal Jacket Brass Cased Centerfire Rifle Ammo, 20 Rounds, 81263
(8)
List: $24.99 (Save $1.50)
$23.49
$1.17/Round
Fort Scott Munitions 5.56 NATO Copper 62 Grain Centerfire Rifle Ammo, 20 Rounds, 556-062-SCV1
Fort Scott Munitions 5.56 NATO Copper 62 Grain Centerfire Rifle Ammo, 20 Rounds, 556-062-SCV1
(2)
List: $47.99 (Save 34%)
$31.49
$1.57/Round
Veteran Ammo Defense 5.56x45mm NATO 62 Grain Hollow Point Centerfire Pistol Ammo, 20 Rounds, HMBX-556-24
Veteran Ammo Defense 5.56x45mm NATO 62 Grain Hollow Point Centerfire Pistol Ammo, 20 Rounds, HMBX-556-24
List: $49.99 (Save 23%)
$38.49
$1.92/Round
Freedom Munitions 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Rifle Ammunition
Freedom Munitions 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Rifle Ammunition
(3)
As Low As (Save 12%)
$29.49
$0.58 - $0.59/Round
See all 2 models
Best Rated
Hornady Frontier 5.56x45mm NATO 75 grain Boat Tail Hollow Point (BTHP) Brass Centerfire Rifle Ammunition
Hornady Frontier 5.56x45mm NATO 75 grain Boat Tail Hollow Point (BTHP) Brass Centerfire Rifle Ammunition
(29)
As Low As (Save Up to 17%)
$17.99
$0.90/Round
See all 2 models
Veteran Ammo Defense 5.56x45mm NATO 62 Grain Full Metal Jacket Centerfire Pistol Ammo, 20 Rounds, HMBX-556-25
Veteran Ammo Defense 5.56x45mm NATO 62 Grain Full Metal Jacket Centerfire Pistol Ammo, 20 Rounds, HMBX-556-25
List: $49.99 (Save 22%)
$38.99
$1.95/Round
Hornady Frontier 5.56x45mm NATO 55 Grain Hollow Point Centerfire Rifle Ammunition
Hornady Frontier 5.56x45mm NATO 55 Grain Hollow Point Centerfire Rifle Ammunition
(3)
As Low As (Save Up to 22%)
$13.49
$0.67 - $0.71/Round
See all 2 models
Best Rated
Hornady Frontier 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Rifle Ammunition
Hornady Frontier 5.56x45mm NATO 55 Grain Full Metal Jacket Brass Rifle Ammunition
(47)
As Low As (Save Up to 17%)
$13.49
$0.65 - $0.67/Round
See all 3 models
PMC Ammunition X-Tac Rifle Ammo 5.56 NATO 62 gr Green Tip 1000/ct, 5.56 M855 Case
PMC Ammunition X-Tac Rifle Ammo 5.56 NATO 62 gr Green Tip 1000/ct, 5.56 M855 Case
List: $739.99 (Save 13%)
$645.19
$0.65/Round
Magtech 5.56x45mm Ball M193 - 556ACS
Magtech 5.56x45mm Ball M193 - 556ACS
List: $732.00 (Save $31.51)
$700.49
$0.70/Round
PMC Ammunition X-Tac 5.56x45mm NATO 55 Grain Full Metal Jacket Rifle Ammo, Metal Box, 840 Rounds, 1102741
PMC Ammunition X-Tac 5.56x45mm NATO 55 Grain Full Metal Jacket Rifle Ammo, Metal Box, 840 Rounds, 1102741
List: $632.49 (Save $49.50)
$582.99
$0.69/Each
PMC Ammunition X-Tac 5.56x45mm NATO 62 Grain Full Metal Jacket Boat Tail Rifle Ammo, Metal Box, 840 Rounds, 1102742
PMC Ammunition X-Tac 5.56x45mm NATO 62 Grain Full Metal Jacket Boat Tail Rifle Ammo, Metal Box, 840 Rounds, 1102742
List: $650.49 (Save $48.50)
$601.99
$0.72/Each
Best Rated
Winchester USA 5.56x45mm NATO 55 Grain Full Metal Jacket Centerfire Rifle Ammo, 125 Rounds, USA193125
Winchester USA 5.56x45mm NATO 55 Grain Full Metal Jacket Centerfire Rifle Ammo, 125 Rounds, USA193125
(19)
List: $121.49 (Save 32%)
$82.69
$0.66/Round
Global Ordnance 5.56x45mm NATO, 55 grain, Full Metal Jacket, 20 Rounds Rifle Ammo, GO850003223346
Global Ordnance 5.56x45mm NATO, 55 grain, Full Metal Jacket, 20 Rounds Rifle Ammo, GO850003223346
List: $24.62 (Save 39%)
$14.99
$0.75/Round
Next

Ammo Boxes

1–6 / 6
Previous
Berrys 29682 405 Ammo Box 223 Rem,5.56x45mm NATO 50rd Smoke Lid W/Black Bottom
Berrys 29682 405 Ammo Box 223 Rem,5.56x45mm NATO 50rd Smoke Lid W/Black Bottom
(1)
List: $6.99 (Save 50%)
$3.49
Berrys 79462 405 Ammo Box 223 Rem,5.56x45mm NATO 50rd Clear Lid W/Black Bottom
Berrys 79462 405 Ammo Box 223 Rem,5.56x45mm NATO 50rd Clear Lid W/Black Bottom
List: $6.49 (Save 51%)
$3.19
Berrys 44661 405 Ammo Box 223 Rem,5.56x45mm NATO 50rd Blue Lid W/Black Bottom
Berrys 44661 405 Ammo Box 223 Rem,5.56x45mm NATO 50rd Blue Lid W/Black Bottom
List: $6.99 (Save 50%)
$3.49
Berrys 86410 005 Ammo Box 223 Rem,5.56x45mm NATO 100rd Blue Lid W/Black Bottom
Berrys 86410 005 Ammo Box 223 Rem,5.56x45mm NATO 100rd Blue Lid W/Black Bottom
List: $6.99 (Save 21%)
$5.49
Berrys 11664 005 Ammo Box 223 Rem,5.56x45mm NATO 100rd Smoke Lid W/Black Bottom
Berrys 11664 005 Ammo Box 223 Rem,5.56x45mm NATO 100rd Smoke Lid W/Black Bottom
List: $6.99 (Save 21%)
$5.49
MTM Ammo Rack w 4 RS-50-24 Ammo boxes, Dark Earth/Clear Blue, ARRS
MTM Ammo Rack w 4 RS-50-24 Ammo boxes, Dark Earth/Clear Blue, ARRS
(2)
$43.19
Next

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American Tactical Imports Mil-Sport Upper 5.56 Stainless Steel Barrel and KeyMod Handguard Unavailable & Discontinued Models

List of Unorderable Models

  • American Tactical Imports Mil-Sport Upper, 5.56, 18in, Stainless Steel Barrel, 15in Keymod Handguard, ATI15MS18KM , MPN: ATI15MS18KM , UPC: 853267007455 , Code: AT4-URC-MSSS-ATI15MS18KM
  • American Tactical Imports Mil-Sport Upper, 5.56, 16in, Stainless Steel Barrel, 13in KeyMod Handguard, ATI15MS16KM , MPN: ATI15MS16KM , UPC: 853267007448 , Code: AT4-URC-MSSS-ATI15MS16KM
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Last updated 2026-09-08 UTC.