The bolt carrier group (BCG) is the heart of any AR-15 rifle. It chambers rounds, extracts spent casings, and reliably cycles the firearm. Whether building a custom rifle from the ground up or upgrading your factory platform, selecting the right BCG can make all the difference in performance, longevity, and recoil management. JP Enterprises and … Continue reading JP and M&P 15 Bolt Carrier Group Products: A Comprehensive Comparison