Hydra-Matic Div® M16A1 Rollmarked Semi Auto Receiver
Batch 22 - ETA OCT 2026 - We are making a enough to keep on hand, sign up for in stock notifications for the color you want, when they are finished we will list them!
Batch 21 Shipping
If we run out we will take preorders
2 options - Black w/ANAD Marks or Grey without - No custom requests
Put YOUR cell # in the order & have a copy of your FFL's license sent to ffl@intlmilco.com reference your order # & name
- INTL.MIL.CO is the owner of the HYDRA-MATIC DIV® brand, to ensure traceability on our lowers we operate under the Hydra-Matic Div name as well
- SEMI AUTO We are Licensed 07/02 FFL/SOT - MGs depicted in photos are registered or real examples
- OPTIONAL MK18 MOD0 Engraving (Data packs on backorder and will be sold seprately from this batch, price adjusted)
- If you are building a normal rifle or a MK12 skip this
- 1:1 Markings - Engraving painstaingly copied off REAL Crane Hydra-Matic Mk18-0, see photos
- Roll-stamped markings just like the originals, including the serial # font - Clone correct for MK12 and MK18 rifles, finest M16A1 replica lowers being produced
- MFR Info and model # is laser engraved in the trigger well, visible when rifle is upside down - see photo for example.
- Hydra-Matic Specific Correct Grey Professionally Anodized by best in business OR Black
- Black lowers are great for Mk18 mod 0 since the engraving stands out
- M16 Profile interior pocket (NO Fake Sear Marks)
- All GCA and NFA laws apply - We ship to California
- All our products are in NFA E-File system
- This is a SEMI AUTO recevier and ships to a licensed FFL holder when complete, read the message at the top for submitting FFLs
- I DO NOT OWN Colt / HR / FN Dies
- We don't sell 80% receivers
Email me for questions: sales@intlmilco.com
Sales Tax for Texas Residents
hydramatic m16a1, hydra-matic m16a1, clone m16a1, clone correct
Hydramatic Lower Receiver, Hydramatic lower, hydramatic clone, hydramatic mk18
29 Reviews Hide Reviews Show Reviews
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Must have for collectors
If you're sitting on a high-end parts kit or you've spent a year sourcing all the perfect parts but can't find a receiver worthy of the build this is it. Turned my Malaysian M16A1 and Mk18 into absolute museum pieces. I didn't want to sacrifice all the military markings for the Colt pony on an SP1 receiver or anything like that and I wasn't happy with the engraving look on my custom 80%s, this is the full package proper roll markings look and if I hadn't seen where he puts his manufacturer marks in the store images I may have not even noticed it. 10/10 worth the wait
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HydraMatic Batch 20
It's a really good looking lower. Well finished and well marked
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took a bit, but well worth the wait
It took a while to get to me, but it was well worth the wait. communication with the seller was good, and they let me know about the delays. lower fit really well with my colt upper for my mk12 mod 1 build.
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Hydra-Matic Div™ M16A1 Receiver
Top Shelf all the way! As close as you can get to Genuine! Keep up the good work guys!
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Amazingly accurate
This is an absolutely 100% accurate MK18 MOD 0 lower….. I’m in love with this thing. I purchased a complete upper with the Surefire light and M2 comp from the Navy on a surplus deal….Now I’ve got a replica that has everything from the Crane Systems stamp to the General Motors made USGI property stamp from the Nam era. We had these on our M16 at our command from that era in 2000……and when we got our shipment back from Indiana and put them together this was it…. I’ve matched it up with my pics from back in the day…. And it’s a dead ringer!!!!! I’m loving it baby!!!!
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Hydra MK18 Mod 0
My favorite of the bunch! Well worth the wait, these are likely the best clone lowers on the market! The machining and forgings are all done the same way as the original lowers and the roll marks ARE 1:1. Since Chris owns Hydramatic's trademark, they were able to replicate everything perfectly! The only way you can tell these are reproductions is the missing sear hole. Lastly, the MK18 Crane markings are done exactly the same way they did them when they first starting converting M16A1 lowers into MK18 Mod 0 lowers, some of the best work I have seen! IF you want the most accurate product to an original Hydramatic M16A1, MK12, or MK18 Mod 0, this is it! I don't think you will find anything better! 110% the way to go!
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Hydra-Matic M-16A1 Receiver
Outstanding replica of an arsenal refinished Hydra-Matic. Looks very similar to one issued to me back in the day. Tremendous upgrade to my Mk 12.
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GM Lower Receiver
Awesome receiver! Couldn’t be happier!
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Gm lower
Amazing lower for mk12/m18 builds. Will buy another
