The Spike’s Tactical Gen II Billet Upper Receiver is not just another cosmetic alternative to forged upper receivers. It has been designed with functional upgrades that aren't available on other billet upper receivers! It is machined out of 7075-T6 billet aluminum and anodized with a durable Type III hardcoat. M4 feed ramps are cut before the anodizing process to avoid reliability issues down the road. The side walls of the receiver are flared to eliminate accidental bolt release. The upper receiver has also been machined to accommodate the Magpul BAD lever or similar aftermarket bolt catch levers.
NOTE: This billet upper is not compatible with all aftermarket bolt catches.