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Questions & Answers
Does it come with a gas block and or is it dimpled Expert Answer

The Spikes Tactical 5.56 Special Purpose 18in Medium Profile Rifle Barrel does not come with a gas block and is not dimpled.

by Ethan, Gear Expert, February 14, 2022
Does it come with the barrel nut? Expert Answer

No, it does not.

by Kurt Colbourne, Gear Expert, July 29, 2021
Customer Reviews
Most Recent Reviews
Great for Medium Range Build by Sam Lyons, Verified Owner, December 28, 2025
Fit and finish are excellent on this Spikes 18” SPR barrel.Gassing is good with no failures/last round hold open issues while using a standard weight BCG(Spikes Tactical Nickel Boron BCG,) Spikes Tactical Stainless 3 Port Brake(because California,) A...
Read More...
Most Recent Reviews
Poor accuracy by Sam, Verified Owner, August 21, 2022
After significant testing with factory match and hand loaded ammunition, the barrel would not perform as expected - the best it did was ~2" at 100yd, with most 5-shot groups exceeding that by a significant amount (3-4"). The tech at Spikes was helpfu...
Read More...
Most Recent Reviews
Great Barrel for DMR by Myles, Verified Owner, December 31, 2021
I've had this barrel now for the better part of a year and can say it's held up really well. I've been putting 77gr. HPBT and 69gr. .223 Rem. rounds through it and I managed to get a 1 MOA group in testing. Make no mistake though, it shoots perfectl...
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Most Recent Reviews
Perfect fit and accuracy by Sean Canevari, Verified Owner, December 3, 2020
I wanted to build a tak driver and this barrel does exactly that. The fitment into my upper receiver was perfect and OP got it to me in a very timely manner. I didnt have to use any shims for the barrel or muzzle break and the gas system fitment was ...
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Read All 4 Reviews
Color:
Black
Caliber:
5.56x45mm NATO
Barrel Length:
18 in
Barrel Profile:
Medium
Gas System Length:
Rifle Length
Barrel Twist Rate:
1-7
Firearms Threads Per Inch:
1/2x28

Code: 2A8-ATB-SP18MPRB-SB51807-MPM

MPN: SB51807-MPM

UPC: 815648026127

List: $349.95Save 10%
$314.96

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OP Bucks$7.31

made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Spikes Tactical 5.56 Special Purpose 18in Medium Profile Rifle Barrel

The Spike's Tactical 18in CHF Special Purpose Rifle Barrel w/ 1/2 X 28 Thread Pitch is the perfect barrel for those who are looking for a well crafted barrel that will not let you down when you need it most. Manufactured with a DIN 21CrM0V511 coating, this Rifle Barrel from Spike's Tactical will provide you with years of reliable and efficient use. Thanks to the .750 gas block seat, you won't have to mess around with aftermarket barrels or modifications. The black nitrite inside and out of the Spike's Tactical Rifle Barrel will make sure that you have a long lasting and reliable barrel that will hold up shot after shot. For a great way to make sure you are working with one of the best barrels the shooting industry has to offer, choose the Spikes Tactical 18in Special Purpose Rifle Barrel.image

Specifications for Spikes Tactical 5.56 Special Purpose 18in Medium Profile Rifle Barrel:

Manufacturer: Spikes Tactical
Color: Black
Caliber: 5.56x45mm NATO
Barrel Length: 18 in
Barrel Profile: Medium
Gas System Length: Rifle Length
Barrel Twist Rate: 1-7
Firearms Threads Per Inch: 1/2x28
Country of Origin: USA

Features of Spikes Tactical 5.56 Special Purpose 18in Medium Profile Rifle Barrel:

  • 18in CHF Barrel
  • Cold Hammer Forged
  • DIN 21CrM0V511
  • Black Nitrite Inside and Out
  • 1/7 Twist Rate
  • 1/2 X 28 Thread Pitch for Muzzle
  • 5.56 Nato Chamber
  • .750 Gas Block Seat
  • NIB M4 Feed Ramped Barrel Extension
  • Rifle Gas

Package Contents:

  • Spikes Tactical 5.56 Special Purpose 18in Medium Profile Rifle Barrel

Spikes Tactical 5.56 Special Purpose 18in Medium Profile Rifle Barrel Orderable Models

List of Orderable Models

  • Spikes Tactical Barrel 5.56 - 18in SPR Medium Profile - Melonited, SB51807-MPM , MPN: SB51807-MPM , UPC: 815648026127 , Code: 2A8-ATB-SP18MPRB-SB51807-MPM
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