Don't want to wait for a custom build? Check out our immediately available inventory! Shop In-Stock Rifles Build Your XCR XCR-L XCR-L Competition Build Now XCR-L Mid Build Now XCR-L Standard Build Now XCR-L Standard Short Gas System Build Now XCR-L Mini Build Now XCR-M XCR-M Competition Build Now XCR-M Standard Build Now XCR-M Mini Build Now XCR-M Mini Short Gas System Build Now Showing 177–181 of 181 results Default sorting Sort by popularity Sort by latest Sort by price: low to high Sort by price: high to low XCR-M Upper Receiver Keymod Standard $570.00 XCR-M Upper Receiver M-LOK Standard $600.00 XCR-M Upper Receiver M-LOK Competition $600.00 XCR-M Upper Receiver M-LOK Micro $600.00 XCR-M Upper Receiver M-LOK Mini $600.00 ← 1 2 3 … 9 10 11 12