Wheeler Delta AR LR/10 Lapping Tool – Upper Receiver Alignment Tool for AR-10 Pattern Rifles

The Wheeler Delta AR LR/10 Lapping Tool is designed to true and align the upper receiver bearing surfaces on AR-10 and LR-308 pattern rifles. This precision lapping tool ensures proper alignment between the upper receiver and barrel extension, eliminating manufacturing inconsistencies that can affect accuracy and lockup. Essential for builders and armorers working with large-frame AR platforms.

The hardened steel tool features a precisely machined surface that matches AR-10/LR-308 upper receiver dimensions. Applied with lapping compound (not included), it removes high spots and ensures consistent metal-to-metal contact across the entire bearing surface. Improves bolt carrier group fit and can reduce bolt carrier tilt that affects accuracy in large-frame rifles.

• Platform: AR-10 / LR-308 pattern rifles
• Material: Hardened steel
• Function: Upper receiver bearing surface alignment
• Use: With fine lapping compound (sold separately)
• Application: Precision rifle building and armorer work