This magazine adapter is the only product on the market that will permit the use of a PX4 .45 ACP mag in the CX4 .45 magwell. While SierraPapa is known for providing metal replacements for plastic stock CX4 parts, there are times when plastic is the right material to use. In the case of this mag adapter, 3D PLA printing produced a thin, flexible, but sturdy adapter that hooks securely into your mag well and drops the mag out freely when the accompanying mag release button is pressed. The optional SP release button is slightly longer than the stock button, and its increased length and grippy surface improve feel and function over the shorter, more slippery stock part.

8045 mags can be very difficult to come by, and this PX4 magwell adapter adds flexibility to your CX4 45 set up and is especially suited to those who already own a PX4 45. Those who want to increase the capacity of their 8045 CX4 mags to 16 or 15 rounds should consider our CX4 magazine extension.

PLEASE NOTE: The adapter and release button may be used together, but your stock 8045 mag release button may also be used. 

Price for the adapter/mag release button kit: $88.00*

Price for the magwell adapter only: $61.50*

Price for the mag release button only: $26.50*

Shipping charge $10.50* by USPS Priority Mail

*A credit card processing fee of 3% applies to all credit card transactions. Payment by check, money order, or cash allows us to waive processing fees and keep our prices lower.

Be sure to view our warranty and terms of sale.