Black Rifle Arms THE ENFORCER 7.62x39 Low Profile Regulated 8.5" Piston Upper, 4 Position Gas Regulated Piston Upper

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Black Rifle Arms^®THE ENFORCER AR-15 8.5" L.P.R. 7.62x39 Piston Upper with 7" Aero Precision Enhanced M-Lok Handguard

Q: Does this piston upper have an internal buffer or does it require a buffer tube?

Asked by: David - 9/4/2025

A: No internal buffer, it requires a mil-spec AR-15 lower.

Answer provided by: Administrator (9/5/2025)

Q: 1). Will this work on a PSA multi-cal lower? 2). What buffer due recommend ? 3). Has this been tested using Wolf as the 11.5 is said to have been? 4). What else do I need to know?

Asked by: William Keller - 1/6/2022

A: 1) Yes this will work on any mil-spec multi-cal lower, if PSA is to mil-spec it will work.

2) We recommend either a Standard Buffer and Carbine Spring
H2 Buffer and Carbine Spring.

3) Yes we only test with Wolf Ammunition on all our complete uppers before they ship.

4) We recommend on this caliber and gas operating length: Standard Buffer and Carbine Spring and/or
H2 Buffer and Carbine Spring

Answer provided by: Administrator (1/6/2022)

Q: 1). What does the L.P.R. Stand for? 2). What does the C.A.P.S. stand for on the 11.5in

Asked by: William Keller - 1/6/2022

A: L.P.R. stands for Low Profile Regulated
C.A.P.S. stands for Combat Adaptive Piston System

You can find out more about these systems here: https://www.blackriflearms.com/PISTON-VIDEOS_ep_40.html

Answer provided by: Administrator (1/6/2022)

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THE ENFORCER 7.62x39 L.P.R. 8.5" Piston Upper with A.P. 7" M-Lok Handguard

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