Muzzle brake/flash hider

[earni74]

I have been tasked to I.D this piece, the threaded end is OD 55mm and the thread diameter is 40.5mm, i dont know what the thread is,mm or Imperial, the length of the piece is 280mm,the wide end is 82mm diameter,can anyone supply any mor info on the piece, i have come to a dead end with it and it is not my field.
the green bag that contains the piece has inks on it ( hard to read) the stamp on the piece is shown in one of the pics Thanks

 

[earni74]

Re above, looking for type and caliber of weapon used on, Thanks

 

[TimG]

https://www.iso-group.com/NSN/1005-99-963-0516 - Flash hider 30mm Rarden.

44 Application of Firearms Acts to sound moderators etc​

(1) The Firearms Act 1968 is amended as follows.

(2) After section 2 insert—

“2A Possession of a sound moderator or flash suppressor​

(1) Subject to any exemption under this Act, it is an offence for a person to have in their possession a relevant accessory unless the person holds a firearm certificate or a shot gun certificate.

(2) “Relevant accessory” means an accessory to a firearm to which section 1 applies which is designed or adapted to diminish the noise or flash caused by firing the firearm.”

TimG

 

[earni74]

Thanks TimG, i will show him your reply

 

[ydnum303]

Mick,
The stamps appear to show a type of "broad arrow", and the ED monogram of Enfield. What is the diameter of the exit hole?

Roger.

 

[earni74]

Hi Roger,if you mean the exit end, its 82mm as mentioned in my first post
Mick

 

[Linkman]

The long number 1005-99-963-0516 is the NSN (NATO Stock Number). I just put this into the search engines and returned the Original Equipment Manufacturer's (OEM) reference FL17141. Description is Flash Hider for 30mm RARDEN autocannon. Confirms Tim's reply.