Angstadt Arms Angstadt bolt carrier group.40s&w ar-15 glock black FEATURES:
Machined from 8620 alloy steel with a QPQ black nitride finish
Compatible with GLOCK® 40 S&W magazines
For use with a standard AR-15 hammer
Features removable weight for use with Law Tactical folding stock adapter
Other Features: Uses standard ar-15 hammer, compatible with glock.40s&w magazines