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JMac Customs 1913 Adapter for MP5 and Clones
$99.95 $89.96 Save 10%
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Expert Review

Unbeatable Quality

by Andrew, Gear Expert from IL, United States Written on July 18, 2023
You're not going to find a better 1913 adapter for your MP5 on the market than this one. Attachment options are endless with this and it fits snug and tight without any slop. With other endplates, I've run into cycling issues with my AP5 due to variances in the buffer pad. Not with this one. I am thoroughly impressed with the build quality and will definitely be picking up more products from JMac Customs!
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Loose fit on PTR

by Matti, Verified Owner from WY, United States Written on September 29, 2025
This does not fit tightly on my PTR. Further, it lacks any contouring or tabs to use the stock channel for stability. The single pin of the full size MP5 becomes a pivot point with this design, and the stock tilts downward from the rear of the frame.
Pros:
  • Looks good
Cons:
  • Loose
  • unstable
Would recommend: No
Was it helpful to you? Yes | No

solid build

by Abraham, Verified Owner from CA, United States Written on August 20, 2025
Doesnt fit the mp5sd-22 without a lot of love, downside needs a mallet to get it out overall construction is solid.
Would recommend: Yes
Was it helpful to you? Yes | No

Good Enough

by Peyton Bagby, Verified Owner from FL, United States Written on July 27, 2024
Tried to put on a OEM HK mp5 and the holes did not align, the holes needed to be moved up a 1/4 inch so I just drilled it. It works fine and still is a really tight fit on the gun.
Would recommend: Yes
Was it helpful to you? Yes | No

Does It’s Job

by Triangle 26, Verified Owner from CO, United States Written on July 15, 2024
This is a very simple product, but it does its job well. It is extremely tight on my AP5 receiver, such that I need a soft mallet to install and remove it. I used a dab of grease to try and protect the metal finish, but it still scuffed things up pretty good. I’m fine with that though, a tight fit is a solid fit. Dropped one star for price, $100 seems like a lot for what is a technically simple part.
Pros:
  • Sturdy
Cons:
  • value
Would recommend: Yes
Was it helpful to you? Yes | No

MP5 1913 Solution

by Asfitdaddy, from TX, United States Written on July 14, 2024
An excellent option for adding a reasonably priced stock solution for your MP5 clones. Fits my PTR 9C like a glove.
Would recommend: Yes
Was it helpful to you? Yes | No

Fits like a glove

by Niko, Verified Owner from VA, United States Written on June 22, 2024
Installed on my PTR 9CT-CL and was an ease, nice and snug. Will be installing a brace and take to the range, so far I'm liking it. If one thing could be changed, maybe adding slide groves to align with rails on the side of the MP5 so if you decide to add a sliding pull rod stock/brace.
Pros:
  • EASY INSTALL
  • allows you to install any picatinny stock/brace
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No

Feels sturdy

by yotaman71, Verified Owner from CA, United States Written on June 11, 2024
It’s honestly a nice touch to my ZF-5 and it fits great. Install was simple as can be; just double check the spacer inside is orientated correctly.
Pros:
  • Tight fit
  • Looks & Feels Great
  • simple & easy
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No

Fit my AP5 perfectly

by Angrypasta, Verified Owner from FL, United States Written on May 20, 2024
Fit on my AP5 was so good, it felt like it was made especially for my gun. Finish is a shiney black that doesn't match the rest of the gun, but easy to overlook given the quality is otherwise solid. OP has the best price on this thing with a coupon and free shipping, and even shipped surprisingly quick via USPS instead of thr usual slow DHL. Very satisfied with my purchase. Highly recommend for full size AP5 users.
Would recommend: Yes
Was it helpful to you? Yes | No

Mp5 1913 Adapter

by LD, LLC, Verified Owner from PA, United States Written on April 2, 2024
Bought this for a PTR clone. Goes right on, great fit, no slop. Solid mount. DO NOT purchase the mp5k version if your back plate slides over the frame. Would love to see the price point a little lower - Only criticism here.
Pros:
  • Quality, fit, durability
Cons:
  • price
Best Used for:
  • Mp5 or clone with outside fitting back plate.
Would recommend: Yes
Was it helpful to you? Yes | No

Easy install on new SP5

by JJs SP5, from FL, United States Written on March 27, 2024
I went with an Sig stock on my new SP5 SBR and needed this adapter to put it all together. It fit perfectly and took 30 seconds to install.
Pros:
  • Tight fit (good in every situation)
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No
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