MK18 Build

[Panther [TFW-W02]]

There are varying barrel lengths.
The MK18 Block II has a 14.5 in barrel, a "Block I" is the variant with a 10.3 in barrel and a 9.5 in DD RIS.

[Orwell]

[frogfish]

The blocks are accessories schedules.

http://en.wikipedia.org/wiki/SOPMOD

The mods are the difference between the drop in RIS and the free floating RIS with a low profile gas block.

The Mk18 comes in both a 14.5 and a 10.3 inch variant, there is no designation in the title to differentiate between the lengths.

Peq-16 would not work for a mk18, Peq-16 is standard issue to the USMC, Peq-15 (and whatever the newer socom PEQ that is based off of the 15 is) are what you want for a mk18.

[Panther [TFW-W02]]

Alot of branches took the block II m4 and put DD rails on it and used the block II optics and acessories so thats where the "block II" comes from. u are correct as well in all other regards welshey

[Goliath17]

Would it matter if I had a DD rail system with a bridge over the top rail? Link: http://www.evike.com/product_info.php?c ... s_id=37049

[Panther [TFW-W02]]

Thats an omega, not the ris II which is what u need. If I were I'd go the KWA route, CQR then DD rail and rewire to a cranestock.

[frogfish]

[Panther [TFW-W02]]

So am I write or wrong? It's not a contest for me, I just want to make sure my info going forward is correct.

[frogfish]

I did a massive edit, read it again now it may clear things up for you.

[Panther [TFW-W02]]

Haha that's extensive, it should clear up an questions

[Goliath17]

Come on guys, you don't have to argue about barrel lengths. I'm still going with a 14.5" barrel and a 12" DD RIS II

[Panther [TFW-W02]]

that's probabl the best choice for a field gun configuration

[Goliath17]

Last question, do I have to have a 553 holographic sight? Because I already have a 552

[frogfish]

You don't have to have any sight on there, but if you are building a Mk18 in particular you should see if its been used or fits the accessories block for the timeframe you are looking at. However coincidentally 552s have been spotted on older Mk18s.

Just remember the accessories do not determine if its a Mk18 or not, Mk18 is the weapon. The Block and the timeframe determine the accessories you are to use (to a certain extent).

Another thing to help, the Navy has no M4s, just as it has no SIG226s, it has Mk18s and Mk25s.

[dos_Santos]

That was a good read. I have a gun, and it shoots BB's. Call your hits.