MPA Defender Side-Cocker Semi Auto Pistol, 5.7X28, 4.5 in Barrel |

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MPA + Firearms MPA Firearms MPA Defender Side-Cocker Semi Auto Pistol, 5.7X28, 4.5 in Barrel MPA + Firearms MPA Firearms + Handguns MPA Handguns MPA Defender Side-Cocker Semi Auto Pistol, 5.7X28, 4.5 in Barrel

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Image of MPA Defender Side-Cocker Semi Auto Pistol, 5.7X28, 4.5 in Barrel

MPA Defender Side-Cocker Semi Auto Pistol, 5.7X28, 4.5 in Barrel

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This page is for information purpose only

OpticsPlanet, Inc. does not currently sell this specific item regulated under the National Firearms Act (NFA).

Product Info for MPA Defender Side-Cocker Semi Auto Pistol, 5.7X28, 4.5 in Barrel

The 57DMG uses a fully machined aluminum lower receiver and fully machined aluminum grips. The coating on this model is black

The machining of the lower and grip reduces weight and certainly increases the level of comfort and ergonomics from our previous design MPA57SST.

Each receiver is laser engraved with the appropriate information. The new design also provides complete compatibility with the FN57 magazines in both 20 and 30 round capacity.

Specifications for MPA Defender Side-Cocker Semi Auto Pistol, 5.7X28, 4.5 in Barrel:

Manufacturer:	MPA
Gun Make:	MasterPiece Arms
Gun Type:	Pistol
Caliber:	5.7x28mm
Barrel Length:	4.5 in
Material:	Aluminum
Sight Configuration:	Adjustable Front & Rear
Safety Type:	Lever
Magazine Capacity:	20 Round
Length:	16.9 in
Firearm Frame Color:	Black
Slide Color:	Black
Firearm Frame Material:	Aluminum
Magazine Included:	Yes
Muzzle Device:	Muzzle Brake
Firearms Threads Per Inch:	1/2x28
Number of Magazines Included:	1

Ammunition

1–19 / 19

Fiocchi Range Dynamics 5.7x28mm 62 Grain FMJ Brass Pistol Ammo, 50 Rounds, 57SUB62

Fiocchi Range Dynamics 5.7x28mm 62 Grain FMJ Brass Pistol Ammo, 50 Rounds, 57SUB62

List: $42.10 (Save 18%)

FN America GUNR 5.7X28, 40 Grain, Pistol Ammo, 50 Rounds, 10700032

FN America GUNR 5.7X28, 40 Grain, Pistol Ammo, 50 Rounds, 10700032

List: $51.48 (Save 34%)

Hornady Black, 5.7x28mm, 40 Grain, V-MAX Centerfire, Rifle Ammo, 25 Rounds, 90001-25RD

Hornady Black, 5.7x28mm, 40 Grain, V-MAX Centerfire, Rifle Ammo, 25 Rounds, 90001-25RD

List: $38.97 (Save 18%)

Fiocchi Hyperformance Defense 5.7x28mm 40grain Tipped Hollow Point Brass Pistol Ammo, 50 Rounds, 57PT40

Fiocchi Hyperformance Defense 5.7x28mm 40grain Tipped Hollow Point Brass Pistol Ammo, 50 Rounds, 57PT40

List: $52.99 (Save 35%)

Fiocchi Range Dynamics 5.7x28mm 40 Grain FMJ Brass Pistol Ammo, 150 Rounds, 57FMJ40

Fiocchi Range Dynamics 5.7x28mm 40 Grain FMJ Brass Pistol Ammo, 150 Rounds, 57FMJ40

List: $106.99 (Save 14%)

FN America FN SS198LF 5.7X28 27 Grain LF JHP Pistol Ammo, FNH10700021

FN America FN SS198LF 5.7X28 27 Grain LF JHP Pistol Ammo, FNH10700021

List: $81.33 (Save 22%)

Speer Gold Dot 5.7x28mm 40 Grain Hollow Point Centerfire Pistol Ammo, 50 Rounds, 25728GD

Speer Gold Dot 5.7x28mm 40 Grain Hollow Point Centerfire Pistol Ammo, 50 Rounds, 25728GD

Price After Rebate

Hornady Critical Defense, 5.7x28mm, 40 Grain, FTX Centrefire, Rifle Ammo, 25 Rounds, 90000-25RD

Hornady Critical Defense, 5.7x28mm, 40 Grain, FTX Centrefire, Rifle Ammo, 25 Rounds, 90000-25RD

List: $42.19 (Save 18%)

Fiocchi Hyperformance Defense 5.7x28mm 35grain Jacketed Frangible Brass Pistol Ammo, 50 Rounds, 57JF35

Fiocchi Hyperformance Defense 5.7x28mm 35grain Jacketed Frangible Brass Pistol Ammo, 50 Rounds, 57JF35

List: $71.99 (Save $6.50)

Vanguard Outfitters Blackfang Obsidian Dragon 7x28 34 Grain BFD V57 Brass Cased Rifle Ammo, 25 Rounds, 25, VGBFO

Vanguard Outfitters Blackfang Obsidian Dragon 7x28 34 Grain BFD V57 Brass Cased Rifle Ammo, 25 Rounds, 25, VGBFO

List: $65.99 (Save 12%)

FN America 5.7x28mm 27 Grain Lead Free Jacketed Hollow Point Brass Case Pistol Ammunition

FN America 5.7x28mm 27 Grain Lead Free Jacketed Hollow Point Brass Case Pistol Ammunition

As Low As (Save Up to 23%)

$1.12 - $1.15/Round

See all 2 models

Vanguard Outfitters Subsonic 5.7x28mm 55 Grain Solid Copper Brass Cased Rifle Ammo, 25 Rounds, 25, VGSub

Vanguard Outfitters Subsonic 5.7x28mm 55 Grain Solid Copper Brass Cased Rifle Ammo, 25 Rounds, 25, VGSub

List: $55.99 (Save 20%)

Vanguard Outfitters GPM 5.7x28 36 Grain Monumental VO Brass Cased Rifle Ammo, 25 Rounds, 25, VGGPM

Vanguard Outfitters GPM 5.7x28 36 Grain Monumental VO Brass Cased Rifle Ammo, 25 Rounds, 25, VGGPM

List: $39.75 (Save $3.26)

Federal Premium Centerfire Handgun Ammunition 5.7x28mm 40 grain Hornady V-Max Brass Cased Centerfire Rifle Ammo, 50 Rounds, SS197SR

Federal Premium Centerfire Handgun Ammunition 5.7x28mm 40 grain Hornady V-Max Brass Cased Centerfire Rifle Ammo, 50 Rounds, SS197SR

List: $40.99 (Save 15%)

FN America SS197SR 5.7x28mm 40 Grain Hornandy V-Max Brass Cased Pistol Ammo, 500 Rounds, FN10700015

FN America SS197SR 5.7x28mm 40 Grain Hornandy V-Max Brass Cased Pistol Ammo, 500 Rounds, FN10700015

List: $369.00 (Save $8.01)

Fiocchi Range Dynamics 5.7X28mm 41/40 Grain FMJ/THP Brass Rifle Ammo, Bulk Pack, 400 Round, 57COMPT

Fiocchi Range Dynamics 5.7X28mm 41/40 Grain FMJ/THP Brass Rifle Ammo, Bulk Pack, 400 Round, 57COMPT

List: $309.99 (Save 11%)

FN America DFNS, 5.7X28, 30 Grain, Pistol Ammo, 50 Rounds, 10700030-50RD

FN America DFNS, 5.7X28, 30 Grain, Pistol Ammo, 50 Rounds, 10700030-50RD

List: $46.90 (Save $1.91)

Fiocchi Range Dynamics 5.7X28mm 41/62 Grain FMJ Brass Rifle Ammo, Bulk Pack, 400 Round, 57COMSUB

Fiocchi Range Dynamics 5.7X28mm 41/62 Grain FMJ Brass Rifle Ammo, Bulk Pack, 400 Round, 57COMSUB

List: $325.99 (Save 10%)

FN America 5.7x28mm 27 Grain JHP Brass Cased Pistol Ammo, 2000 Rounds, SS198LF

FN America 5.7x28mm 27 Grain JHP Brass Cased Pistol Ammo, 2000 Rounds, SS198LF

Firearm Case

1–30 / 30

RUKX Gear Discrete AR Pistol Bag

RUKX Gear Discrete AR Pistol Bag

As Low As (Save Up to 23%)

See all 2 models

Pelican V300PF5 Vault Universal 5-Pistol Case, Black, V300, 25-044300-01

Pelican V300PF5 Vault Universal 5-Pistol Case, Black, V300, 25-044300-01

List: $165.99 (Save 16%)

Pelican VAULT V100 Small Pistol Case, 12.28in

Pelican VAULT V100 Small Pistol Case, 12.28in

As Low As (Save Up to 32%)

See all 2 models

Galati Gear Pistol Case, Small Pistol, with Two Exterior Pockets 105972

Galati Gear Pistol Case, Small Pistol, with Two Exterior Pockets 105972

List: $36.10 (Save $3.11)

Voodoo Tactical Enlarged Pistol Case

Voodoo Tactical Enlarged Pistol Case

List: $34.95 (Save 14%)

See all 3 models

MTM Tactical Pistol Handgun Case

MTM Tactical Pistol Handgun Case

As Low As (Save Up to 19%)

See all 3 models

Pelican V525PF7 Vault 7-Pistol Case, Black, V525, VCV525-0061-BLK

Pelican V525PF7 Vault 7-Pistol Case, Black, V525, VCV525-0061-BLK

Galati Gear Takedown Case w/ Inside Straps

Galati Gear Takedown Case w/ Inside Straps

As Low As (Save Up to 13%)

See all 2 models

Allen Pistol Tote, Most Semi-Auto Handguns & Revolvers, Black, 3640

Allen Pistol Tote, Most Semi-Auto Handguns & Revolvers, Black, 3640

List: $23.49 (Save 40%)

Pelican VAULT V300 Case, Large Pistol, 17.54in, Black, VCV300-0000-BLK

Pelican VAULT V300 Case, Large Pistol, 17.54in, Black, VCV300-0000-BLK

List: $132.98 (Save 32%)

GPS Tactical Double + 2 Pistol Case

GPS Tactical Double + 2 Pistol Case

As Low As (Save Up to 50%)

See all 2 models

Elite Survival Systems Pistol Grip Shotgun Case, Black, SACB-3

Elite Survival Systems Pistol Grip Shotgun Case, Black, SACB-3

List: $76.95 (Save 15%)

Kryptek Centurion Pistol Rug

Kryptek Centurion Pistol Rug

See all 5 models

Flambeau Safe Shot Pistol Pack Series Gun Case

Flambeau Safe Shot Pistol Pack Series Gun Case

As Low As (Save 11%)

See all 2 models

Plano Aw2 Four-pistol Case, Black/Yellow, PLA118XL

Plano Aw2 Four-pistol Case, Black/Yellow, PLA118XL

List: $99.99 (Save 19%)

UTG Pro Alpha Battle Carrier Sling Packs

UTG Pro Alpha Battle Carrier Sling Packs

List: $89.97 (Save 11%)

See all 3 models

Magpul Industries DAKA Single Pistol Case

Magpul Industries DAKA Single Pistol Case

List: $39.95 (Save 10%)

See all 2 models

Galati Gear Double Pistol Case, Olive Drab, 12.5 x 3 x 8 in, GLDPC10OD

Galati Gear Double Pistol Case, Olive Drab, 12.5 x 3 x 8 in, GLDPC10OD

Plano Aw2 Single Pistol Case, Black/Yellow, PLA118MD

Plano Aw2 Single Pistol Case, Black/Yellow, PLA118MD

Elite Survival Systems Deluxe Pistol Case, Black, ADPC-B

Elite Survival Systems Deluxe Pistol Case, Black, ADPC-B

List: $52.74 (Save 15%)

Plano Tactical Series Pistol Case, 18.25In, Black, PMC1071800

Plano Tactical Series Pistol Case, 18.25In, Black, PMC1071800

List: $50.57 (Save 24%)

VISM Tactical Subgun AR & AK Pistol Case, 28in, Green, CVCP2961G-28

VISM Tactical Subgun AR & AK Pistol Case, 28in, Green, CVCP2961G-28

List: $37.99 (Save $2.00)

Plano Single Pistol Case, 11.5In, Black, PMC140300

Plano Single Pistol Case, 11.5In, Black, PMC140300

List: $18.40 (Save 46%)

SIG SAUER Negrini Pistol Case, Small, 8591242-R

SIG SAUER Negrini Pistol Case, Small, 8591242-R

Pelican VAULT V200 Case, Medium Pistol, 15.41in, Black, VCV200-0000-BLK

Pelican VAULT V200 Case, Medium Pistol, 15.41in, Black, VCV200-0000-BLK

List: $108.98 (Save 27%)

Allen Ballistic Nylon Pistol Case w/ Mag Pouch, Full-Size Handguns, 9.5in Long, Lockable, Hanging Loop, Soft Brushed Lining, Black, 78-9, 78-9

Allen Ballistic Nylon Pistol Case w/ Mag Pouch, Full-Size Handguns, 9.5in Long, Lockable, Hanging Loop, Soft Brushed Lining, Black, 78-9, 78-9

List: $31.99 (Save 28%)

SKB Cases iSeries 1209 Mil-Spec Pistol Case

SKB Cases iSeries 1209 Mil-Spec Pistol Case

See all 2 models

Savior Equipment Specialist Double Rifle Case

Savior Equipment Specialist Double Rifle Case

As Low As (Save Up to 17%)

See all 9 models

SKB Cases 1209 Custom Single Pistol Case

SKB Cases 1209 Custom Single Pistol Case

See all 2 models

Voodoo Tactical Hard Sided Pistol Case

Voodoo Tactical Hard Sided Pistol Case

As Low As (Save Up to 13%)

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Vortex Defender-CCW Enclosed Solar Micro 1x20.2mm Reflex Red Dot Sight (56) List: $399.99 (Save 34%) $264.49 14% Coupon

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Vortex Defender-ST Enclosed Solar Micro 1x22.5mm Reflex Red Dot Sight (64) List: $529.99 (Save 40%) $319.99 14% Coupon

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MPA Defender Side-Cocker Semi Auto Pistol, 5.7X28, 4.5 in Barrel Unavailable & Discontinued Models

List of Unorderable Models

MPA Defender Side-Cocker Semi Auto Pistol, 5.7X28, 4.5 in Barrel, Adjustable Sight, Aluminum Black Frame, Aluminum Grip, 1-Mag, 20 Round Capacity, MPA57DMG-FRRMPG , MPN: MPA57DMG , UPC: 784672659758 , Code: 2CT-FH1-NV661-MPA57DMG-FRRMPG

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MPA + Firearms MPA Firearms MPA Defender Side-Cocker Semi Auto Pistol, 5.7X28, 4.5 in Barrel MPA + Firearms MPA Firearms + Handguns MPA Handguns MPA Defender Side-Cocker Semi Auto Pistol, 5.7X28, 4.5 in Barrel

Last updated 2026-07-10 UTC.