UPC 045635539006 from 44 retailers

  • Magazines
  • 5.7x28mm FN
  • MasterPiece Arms
Shipping:

MASTERPIECE ARMS DEFENDER - These polymer magazines are made for all

Price History
MasterPiece Arms 5770 MPA 20rd 5.7x28mm For MasterPiece Arms Defender Black Polymer
$5 Off Code CALIBERKING
$33.89/ct $33.89 Gun Place ★★★★★ (206)
MasterPiece Arms 5770 MPA 20rd 5.7x28mm For MasterPiece Arms Defender Black Polymer
Shipping $20 Free Shipping > $1,000
$36.89/ct $36.89 Life2A ★★★★★ (3)
Low cost shipping boost

UPC 045635539006 Price Graph

  • Today's low of $33.89/mag is cheaper than 19% of daily lows in the last 180 days.
  • Today's average of $40.48/mag is more expensive than 99% of daily averages in the last 180 days.
  • The low peaked at $35.38/mag on June 16, 2026 and bottomed at $33.89/mag on October 23, 2026.

MasterPiece Arms 5770 MPA 20rd 5.7x28mm For MasterPiece Arms Defender Black Polymer
$35.38/ct $35.38 Vital Defense ★★★★★ (14)
MasterPiece Arms 5770 MPA 20rd 5.7x28mm For MasterPiece Arms Defender Black Polymer
Free Shipping > $900 CC Fee 3%
$36.06/ct $36.06 Armed in Michigan ★★★★★ (714)
MasterPiece Arms MPA 20rd 5.7x28mm Magazine — Black Polymer
$36.22/ct $36.22 Georgia Guns & Ammo ★★★★★ (2)
MPA MAGAZINE 5.7X28MM - 20RD BLACK POLYMER
$36.24/ct $36.24 Patriotic Firearms
MPA MAGAZINE 5.7X28MM - 20RD BLACK POLYMER
$37.03/ct $37.03 MCM Tactical ★★★★★ (60)
MasterPiece Arms 5770 MPA 20rd 5.7x28mm For MasterPiece Arms Defender Black Polymer
Free Shipping > $500
$37.23/ct $37.23 Timber Hole Outdoors ★★★★★ (6)
MasterPiece Arms 5770 MPA 20rd 5.7x28mm For MasterPiece Arms Defender Black Polymer
$37.56/ct $37.56 Allied Arms ★★★★★ (310)
MasterPiece Arms 5770 MPA 20rd 5.7x28mm For MasterPiece Arms Defender Black Polymer
Shipping $13 Free Shipping > $500
$37.73/ct $37.73 Axolotl Arms ★★★★★ (126)

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MPA MAGAZINE 5.7X28MM - 20RD BLACK POLYMER
CC Fee 6%
$37.90/ct $37.90 All Things Firearm ★★★★★ (3)
MPA MAGAZINE 5.7X28MM - 20RD BLACK POLYMER
Free Shipping > $1,250
$38.57/ct $38.57 Nadir Solutions ★★★★★ (18)
MPA MAGAZINE 5.7X28MM - 20RD BLACK POLYMER
$38.65/ct $38.65 Ecommerce Arms
MPA MAGAZINE 5.7X28MM - 20RD BLACK POLYMER
$38.87/ct $38.87 Redsand Tactical
MPA MAGAZINE 5.7X28MM - 20RD BLACK POLYMER
$38.99/ct $38.99 Big Bee Bee ★★★★★ (11)
MasterPiece Arms 5770 MPA 20rd 5.7x28mm For MasterPiece Arms Defender Black Polymer
$39.00/ct $39.00 Highland Arms ★★★★★ (49)
Masterpiece Arms 5.7x28mm Magazine 20rd Polymer Detachable MPA Defender
Free Shipping > $500
$39.23/ct $39.23 Shooting Surplus ★★★★★ (193)
MasterPiece Arms 5770 MPA 20rd 5.7x28mm For MasterPiece Arms Defender Black Polymer
Shipping $20
$39.24/ct $39.24 Custom Creatives Group ★★★★★ (24)
MasterPiece Arms 5770 MPA 20rd 5.7x28mm For MasterPiece Arms Defender Black Polymer
$39.58/ct $39.58 Don's Weaponry ★★★★★ (252)
MPA MAGAZINE 5.7X28MM - 20RD BLACK POLYMER
$39.75/ct $39.75 The Arsenal Project ★★★★★ (16)
MasterPiece Arms 5.7X28 Polymer Magazine MPA5770
Shipping $15 Free Shipping > $500
$39.99/ct $39.99 BuyAGun ★★★★★ (3)
MPA MAGAZINE 5.7X28MM - 20RD BLACK POLYMER
$39.99/ct $39.99 Precision Gunworks
MPA MAGAZINE 5.7X28MM - 20RD BLACK POLYMER
$40.00/ct $40.00 Birmingham Hill Armory ★★★★★ (16)
MasterPiece Arms 5770 MPA 20rd 5.7x28mm For MasterPiece Arms Defender Black Polymer
Shipping $18
$40.25/ct $40.25 Sharp's Shooting Supply ★★★★★ (34)
MPA MAGAZINE 5.7X28MM - 20RD BLACK POLYMER
Shipping $19 Free Shipping > $750
$40.25/ct $40.25 Riddle Firearms
MPA MAGAZINE 5.7X28MM - 20RD BLACK POLYMER
Shipping $15 Free Shipping > $500
$40.90/ct $40.90 Hollow Point Arms ★★★★★ (8)
MasterPiece Arms 5770 MPA 20rd 5.7x28mm For MasterPiece Arms Defender Black Polymer
Shipping $15 Free Shipping > $500
$41.00/ct $41.00 Garrison's Guns ★★★★★ (21)
Masterpiece Arms 20 Round 5.7x28mm Detachable Magazine, Black - 5770
$41.39/ct $41.39 Palmetto State Armory ★★★★★ (1,164)
MPA Magazine 5.7x28mm 20 Round Black Polymer
Shipping $16
$41.93/ct $41.93 Caliber Depot ★★★★★ (6)
MPA MAGAZINE 5.7X28MM - 20RD BLACK POLYMER
$42.07/ct $42.07 Utah Fast ★★★★★ (101)
MPA MAGAZINE 5.7X28MM - 20RD BLACK POLYMER
Shipping $10 Free Shipping > $100
$42.33/ct $42.33 Conkey's Outdoors ★★★★★ (175)
MPA MAGAZINE 5.7X28MM - 20RD BLACK POLYMER
Shipping $25 $25 Off Orders $200+ Code LOCKNLOAD25
$42.73/ct $42.73 Scottsodg.com
MPA MAGAZINE 5.7X28MM - 20RD BLACK POLYMER
$42.99/ct $42.99 Pathfinder Militaria ★★★★★ (106)
MPA MAGAZINE 5.7X28MM - 20RD BLACK POLYMER
$42.99/ct $42.99 WTW Arms ★★★★★ (68)
MasterPiece Arms 5770 MPA 20rd 5.7x28mm For MasterPiece Arms Defender Black Polymer
$42.99/ct $42.99 Black Bayou Armory ★★★★★ (83)
MPA MAGAZINE 5.7X28MM - 20RD BLACK POLYMER
$43.06/ct $43.06 Tungsten Creek Tactical
Mpa Magazine 5.7X28MM - 20RD Black Polymer
$44.07/ct $44.07 Shiner Tactical ★★★★★ (6)
MPA MAGAZINE 5.7X28MM - 20RD BLACK POLYMER
$44.99/ct $44.99 Get Guns N Ammo
MPA MAGAZINE 5.7X28MM - 20RD BLACK POLYMER
Shipping $15 Free Shipping > $500
$45.28/ct $45.28 Kinetic Armory ★★★★★ (3)
MasterPiece Arms 5770 MPA 20rd 5.7x28mm For MasterPiece Arms Defender Black Polymer
Free Shipping > $700
$45.80/ct $45.80 Freedom Firearms ★★★★★ (2)
MasterPiece Arms 5770 MPA 20rd 5.7x28mm For MasterPiece Arms Defender Black Polymer
$46.23/ct $46.23 Bulletproof Outfitters ★★★★★ (133)
MPA MAGAZINE 5.7X28MM - 20RD BLACK POLYMER
$46.96/ct $46.96 Firearms Express
MasterPiece Arms 5770 MPA 20rd 5.7x28mm For MasterPiece Arms Defender Black Polymer
$49.99/ct $49.99 Coastal Firearms
MasterPiece Arms 5770 MPA 20rd 5.7x28mm For MasterPiece Arms Defender Black Polymer
$51.00/ct $51.00 EK Tactical ★★★★★ (10)

UPC 045635539006 Price Graph

  • Today's low of $33.89/mag is cheaper than 19% of daily lows in the last 180 days.
  • Today's average of $40.48/mag is more expensive than 99% of daily averages in the last 180 days.
  • The low peaked at $35.38/mag on June 16, 2026 and bottomed at $33.89/mag on October 23, 2026.

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Gun and ammo deals at their 90-day low.

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