Sig Sauer Locking Insert, P229, P229-1 $95.00 Locking Insert P229 40/357, P229-1 9/40/357. Sig Part: Locking-insert-4 In stock Sig Sauer Locking Insert, P229, P229-1 quantity Add to cart Category: Sig Sauer Related products Sig Sauer Mainspring Seat, P220/6/9 $12.50 Sig Sauer P220 – 29 Reduced Power Hammer Spring Pak, for plastic spring base $24.97