FREE SHIPPING & FREE RETURNS*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Radian Weapons SIG P365 XMACRO Backstrap and Magwell
$192.09 $149.95 Save 22%
View Product
Compare (0)
Most Helpful Positive Review Expensive but well worth it
I have large hands being 6'10" and the standard macro grip, while far superior to the standard 365 was still uncomfortable. This backstrap and magwell makes this small edc feel and control like a full framed gun thanks to the pinky groove and aggressive checkering. Machine quality is also absolutely...
Read More...
Most Helpful Negative Review P365 Radian Backstrap & Magwell
Looks better than it feels. Doesn't feel bad, but it features some sharp edges that are not the most comfortable in the hand. Solid construction and easy installation.
Show
Sort by
Filter by

Perfect fit and finish

by Jeffrey Jaje, Verified Owner from MI, United States Written on August 7, 2025
Perfect fit and finish with an easy installation.
This backstrap does feel nice in the hand, and the magwell complements the design with adding too much width.

It is aluminum, so if you are expecting it to add a bunch of extra weight to the grip, it really does not.
Pros:
  • Fit
  • Finish
  • Grip Feel
Cons:
  • not heavy
Would recommend: Yes
Was it helpful to you? Yes | No

Perfect Addition

by Tony B, Verified Owner from CA, United States Written on July 22, 2025
The backstrap and magwell look great and feel even better! Highly recommend for a better grip feel and stability!
Would recommend: Yes
Was it helpful to you? Yes | No

better magwell

by mr-x0599, Verified Owner from SD, United States Written on June 28, 2025
I really like this magwell and backstrap. I put it on my Fuse, and the original magwell would shift while shooting, or even while dry fire practicing. No shifting with this one. Only knock on it is that the backstrap is so smooth compared to the grip texture on the fuse. The original backstrap with the texturing would stick well in my palm, while this one is a bit slippery compared to it.

Other then that, great magwell!
Would recommend: Yes
Was it helpful to you? Yes | No

Precision crafted and great function

by Ricky, Verified Owner from FL, United States Written on June 21, 2025
You can watch all the YouTube videos on the Radian products, and more specifically on the Radian Ramjet Afterburner barrel/comp combo and this 'backstrap' set-up. But until you run it without the Backstrap/Magwell and then run it WITH THEM, you can't appreciate the difference. My plan was to start with the P365X and break it in 'as is' from Sig in stock configuration.

Then I purchased the Wilson Combat frame and ran that. It was an improvement, but nothing major. But it looked better!

Then when I added the Radian barrel/comp, I said to myself, "Self, these parts be the real deal!" So much more stable and flatter. Then I added the backstrap/magwell and 'self' said to me, "dang you, why did you wait so long to run these!?" (I told 'Self', "next time you should pitch in on the costs and things will go quicker"...lol). I got the Tru17 base plates and light too(works great as a thumb ledge) and my compact tool now performs soooo much better than stock. It's now a totally different marathon runner in NewBalance sneakers!! And... I now have 2 tools in my carry toolbox! Stock 'X' frame for deep concealment, w/light attached and it's own minimalistic 4 o'clock holster, AND my crazy Radian/Macro frame mac-daddy build with it's own light and solid appendix holster. Money well spent to have two tools at the push of one simple take-down pin, thanks to Sig's FCU design!! Hey Sig, 'Self says "Sig be da man witta plan". I said DON"T FORGET RADIAN!!
Would recommend: Yes
Was it helpful to you? Yes | No

perfect upgrade for my EDC

by bigredinca, Verified Owner from CA, United States Written on June 11, 2025
I live in a restricted state where too many upgrades and mods to my EDC might be used against me in court if I ever use my weapon. Additionally, I wanted to stick with the polymer grip because it was lightweight and comfortable as is. This is the perfect upgrade for those wanting to enhance your economics and reload time while maintaining the factory grip. It's a little pricey for what you get but worth it in my case.
Pros:
  • Comfort
  • Ergonomical
  • aestetic
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No

Radial Backstrap and Magwell

by X, Verified Owner from OK, United States Written on June 2, 2025
Been wanting this after seeing other use it and I am satisfied. Adds some weight and balances the gun nicely, the texturing is awesome as well. I appreciate how it gives me a good place to index on when I draw vs the stock backstraps. Got some baseplates as well and am loving the combo.
Would recommend: Yes
Was it helpful to you? Yes | No

Awesome! This is what my P365 needed.

by TheOne, Verified Owner from FL, United States Written on May 14, 2025
This was the missing piece. It made my weapon fits like a glove! Highly recommended! Fast delivery from OpticsPlanet as well. Highly satisfied.
Would recommend: Yes
Was it helpful to you? Yes | No

EASY/FAST MAG RELOAD

by Ron Rigz, Verified Owner from CA, United States Written on May 4, 2025
This Radian magwell and backstrap combo is worth the price. It is an easy intall and provides a fast magazine reload.
Would recommend: Yes
Was it helpful to you? Yes | No

perfect fit !!!

by j, Verified Owner from CA, United States Written on April 23, 2025
I have been looking at this radian backstrap magwell since it came out. The backstrap makes the grip feel way more secure as the grip digs into your palm and is a bit bigger than the L-size grip that comes already with the x macro.
Would recommend: Yes
Was it helpful to you? Yes | No

backstrap and Magwell

by JOSE ESTEVEZ, Verified Owner from VA, United States Written on March 26, 2025
best grip, feels great in the hands an would highly recommend the backstrap an magwell worth every dollar
Would recommend: Yes
Was it helpful to you? Yes | No
There are no reviews that match your criteria. Would you like to review this product?