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The AR-57, also known as the AR Five Seven , is a Lower receiver for the AR-15/M16 rifle and an Upper receiver, firing 5.7×28mm rounds from standard FN P90 magazines. It was designed by AR57 LLC and is currently produced by AR57 of Kent, Washington, USA. The AR-57 PDW Upper is a new design on AR-15/M16 rifles, blending the AR-15/M16 lower with a lightweight, monolithic upper receiver system chambered in FN 5.7×28mm. This model is also sold as a complete rifle, supplied with two 50-round P90 magazines. The magazines mount horizontally on top of the front handguard, with brass ejecting through the magazine well. Hollow AR-15 magazines can be used to catch spent casings.
Unlike the standard AR-15 configuration which uses a gas-tube system, the AR-57 cycles via straight blowback. A full auto version exists marketed as a competitor to the P90 and other personal defense weapons.
JSE Surplus 9mm AR upper (Colt Pattern)
I have only used this on a lower with Colt magazines, I'm not sure if it works with any other type. I bought this a few years back and it's had probably less than a thousand rounds through it. I have recently purchased a buffer less upper, and it only...
Time for me to let project go...
762x39 AR upper
Chrome-molly 16" barrel
Full pick rail
Steel case 7.62x39 ammo available for sale
26 round AR 7.62x39 mags for sale
Pictures coming soon
Howdy, up for trade is a DPMS 16" A2 style upper I have but never use. I bought it used but I think it has never been shot very little if at all. In fantastic shape other than the weird Velcro piece attacked to the hand guard (pictured). Comes with BCG and CH.
Looking to trade for a railed 18"...
Looking to pare down my collection, and pass on a couple of my redundant guns.
Here I have a built ar-15, based off an old-school c-stamped complete Colt upper I got. The barrel, gas block, BCG and upper are all old school Colt. I have them paired with a milspec FN lower, BCM quad...
AR upper reciever. Unknown brand. Plastic milspec handguard, bolt on gas block, 18" 1:24 barrel w/flash hider. Appears to be nothing too special. JE machine adjustable BUIS.
Asking 250 open to trades.
Hey kids, up for sale/trade is a nearly complete upper. It has been mocked up finger tight only, final assembly and minor parts still required. All parts are new, except for the barrel, which has 100 rounds through it and previously rattled canned. Asking $125, free shipping. Would trade trade...
I have a lightly used upper receiver with split A marked Anchor Harvey with forward assist and dust cover door installed
Also have a brand new never used bolt carrier 223/ 556 group mpi tested
Asking $60 -sold-
Also have a new never used charging handle
asking $5 -sold-
Up for sale, Southwest Washington, Vancouver area, Clark County area.
New. Unfired AR upper. 5.56.
Had it assembled at Sporting Systems a year ago. Never got around to taking it out.
Midwest Industries handguard.
Expo arms (Rosco) 16” chrome lined mid length barrel.
Delton barrel and handguard
5.56 chamber, 1:9
Splinter A marker A2 carry handle upper.
This has been rattle canned.
NC star handle rail
+$5 for A2 birdcage- PENDING
+$60 for Deadair Brake
+$75 for BCG and Charging handle PENDING
Last of my spare uppers
All of this stuff was purchased new by me and assembled at a gun shop
VLTOR MUR 1A upper with forward assist
Colt charging handle
Aero bolt carrier group
Colt 10.3” barrel -new- 13629 new cage code
Geissele Mk8 9.3” SMR
5.56 Q cherry bomb
5.56 Q blast shield
For sale is a Stern Defense 8" 9mm AR Upper with around 100 rounds through it. Stern Defense is an awesome product--you can mount it to any standard AR Lower and use their mag conversions in the magwell for Glock, M&P, Sig320, Beretta and possibly others. Cheapest I see this in completed...
I am selling an AR15 upper
Oregon Rifle Works FDE upper
Oregon Rifle Works 9" handguard
Ballistic Advantage 10 1/2 inch barrel, 5.56, 1/7 twist, 4150 steel, unknown round count
Diamondback muzzle brake
Trade interests, 16 inch upper or S&W M&P Compact in 22.
Brand New HK MR556 A1 Complete Upper Receiver/Barrel Assembly HK 16.5 inch cold-hammer forged barrel, upper receiver with forward assist, extended convertible charging handle, HK Free Floating Rail System handguard
Complete MR556 Bolt Group Assembly
Tungsten Filled HK Proprietary Buffer
If you were to "permanently" attach an AR upper and lower together, which parts (besides FCG) would be unserviceable?
Are there any other firearm platforms with similar limitations of having some unserviceable parts once the firearm is assembled?
I decided to sacrifice a lower and upper to...
I do a bit of traveling and take my 16” upper with me. I’m looking for a bag that it would fit into and not be sticking out while broke down. As well as a bit of protection. I have my standard GH bag and it does all I need. But I can’t get a full size upper into it without having the muzzle...