SIG P320 / P226 / P229 Optics Ready Upgrade

From: $50.00


CHPWS, the industry leader and most trusted supplier of adapter plates for pistol-mounted red dots, has been CNC machining slides since the start of the Red Dot Pistol Movement.

Slide Models: P320 / P226 / P229 

We offer to upgrade your factory SIG Romeo1 optic cut to the most recent SIG OEM optic cut – Romeo1 Pro Cut with RMR Holes

This includes upgrading the Romeo1 cut to Romeo1 Pro ($90), adding RMR holes to your Romeo1 Pro Cut ($50), or upgrading your Romeo1 cut to directly mount the RMR/SRO/Holosun 407c/507c/508t ($90).

If you are trying to mount a Holosun 407c/507c/508t or Trijicon RMR onto the Romeo1 Pro Cut there will be a gap at the front of the cut due to these optics being smaller than the Romeo1 Pro optic. Our Romeo1 Pro to RMR filler plate fills this gap providing a more secure fit for these optics.

Slides with the Romeo1 optics cut can also be upgraded to the RMR footprint to provide direct mounting of the Holosun 407c/507c/508t and Trijicon RMR optics without the need for a Romeo1 Pro to RMR filler plate.

**If you just need to add RMR holes to the Romeo1 Pro Cut it is a reduced rate of $75.
**P320s with a lightning cut that extends deeper into the slide in front of the existing Romeo1 Pro screw hole cannot be milled for RMR holes as there is not enough material to add threads for mounting screws.
We reserve the right to call and suggest changes or improvements to your slide milling job.  Some slides can’t be milled and we will send them back at no charge if we determine it can’t safely be upgraded to an optics cut.

Lead Times:
4 Weeks or less or your next milling is FREE!
The clock starts the day we receive your slide.  The clock stops the moment we contact you to let you know your slide is done and ready to ship. We will not ship your slide until we have verified from you that your shipping address is correct.
Excludes slides that require Black Nitride (we don’t do this in house)
Excludes slides that require custom new BUIS sights or optics that are on backorder (we don’t make them and can’t control lead times)
Welcome to the #boomsquad!
Shipping instructions will be provided after your purchase.
(7 customer reviews)


Shipping Instructions:
Safely remove the slide from your pistol. Remove all necessary internal components and iron sights if you selected to send your slide disassembled. Wrap it up, box it up and send it to us using your favorite shipping method (FedEx Ground / UPS / USPS). Please include a copy of your paid invoice or a note with your name, phone number, email address, and order number.

Send your package to:
CHPWS – “ATTN: Slide Milling”
456 Edsel Dr. Suite D
Richmond Hill GA 31324

Questions? – Call us 912-445-5803

Additional information

Weight 5.01 lbs
Dimensions 6 × 1 × 1 in


7 reviews for SIG P320 / P226 / P229 Optics Ready Upgrade

  1. Gary Spencer (verified owner)

    Super quick turn time, excellent quality workmanship, and the process went exactly as described. Extremely pleased!

  2. Stephen Allen (verified owner)

    Thank a lot for the great milled job of adding holes on my Sig Custom Work P-320X Compact slide that I need to install my Holosun HE507C – GR X2 green dot.. With your Red Dot Adapter Plate all fitted just right, without any issues or problems. Will use your services surely again!!!

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