Overview Reviews Product Description Install your P320 firing control unit into this Grip Module Assembly to convert to a P320 X-Series Carry chambered in 9mm, .357 SIG, .40AUTO with your selected grip size. Requires the 9mm, .357 SIG and .40AUTO slide and barrel. Product Videos Custom Field Product Reviews Write a Review Write a Review × Sig Sauer P320, P250 X-carry Grip Module Assembly Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *