AR Parts in 5.56x45mm NATO

Rainier Arms Select 5.56 NATO AR-15 Barrel - 10.5"

Rainier Arms 5.56 NATO AR-15 Barrel - 6.75" Satin (Contract Overrun)

Rainier Arms Mini Compensator - RMC 2.0 SS

Rainier Arms Mini Compensator - RMC 2.0 Black

Q LLC Adjustable Gas Block

PSA 5.56 Premium Full Auto Bolt Carrier Group with Logo - 8779

PSA Dagger Non-Threaded Barrel - Spiral Fluted, Gold

PSA Micro Dagger Barrel - Threaded W/Thread Protector, Gold TiN

PSA 20" CHF Rifle Length 5.56 NATO 1:7 Premium Rifle Kit - 8818

PSA 16" Nitride 1:7 M4 Carbine 5.56 NATO MOE AR-15 Upper Assembly, Black - With Rear Mbus No BCG/CH

PSA 8.5" AR-15 5.56 NATO 1:7 Pistol Length Nitride Barrel

PSA 14.7" Mid-length CHF 5.56 NATO 1:7 13.5" Lightweight M-Lok Upper Pinned & Welded - No BCG or CH - 77932796

PSA AR-15 Barrel 10.5" 5.56 NATO 1:7 Carbine-Length Nitride -77932251

PSA AR-15 Barrel 16" 5.56 NATO 1:7 Mid-Length Nitride - 77932227

PSA 7" Nitride 1:7 Pistol Length 5.56 NATO Marauder AR-15 Upper Assembly, Black - No BCG/CH

PSA AR-15 Barrel 5.56 NATO 10.5" 1:7 Carbine-Length Nitride - 7790025

PSA 20" Rifle Length 5.56 NATO 1/7 Nitride Freedom Rifle Kit - 7788893

PSA AR-15 Barrel 16" 5.56 NATO 1:7 Mid-Length Stainless Steel - 7782785

PSA AR-15 Barrel 5.56 NATO 16" M4 Carbine-Length Nitride

PSA AR-15 Barrel 5.56 NATO 16" M4 Carbine-Length Nitride - 7782393

PSA 16" Mid-length 5.56 NATO 1:7 Nitride MOE Freedom Upper - Without BCG / CH - 7780446

PSA 16" Midlength 5.56 NATO 1:7 Nitride MOE Freedom Rifle Kit - 7780444

PSA 16" Classic M4 Freedom Upper with BCG & Charging Handle, OD Green

PSA 16" Carbine Length 5.56 NATO Classic Freedom M4 Upper w/ BCG and CH, Flat Dark Earth - 7779344