STSBX20 View cart “Spike’s Billet Upper/Lower Receiver Set, 308 The Jack Billet Lower” has been added to your cart. Showing the single result Default sorting Sort by popularity Sort by average rating Sort by latest Sort by price: low to high Sort by price: high to low Sale! IN STOCKSpike’s Billet Upper/Lower Receiver Set, 308 The Jack Billet Lower $643.50 $579.15 Add to cart