Find Parts

Search By Item Number Or Keyword
Search Manufacturers By Letter

Still Can't Find It?

If you're unable to locate an item please contact us directly.

Please have the following information ready:

  1. Firearm Manufacturer
  2. Firearm Model and Serial Number
  3. Gauge or Caliber of Firearm
  4. Part Description
  5. Any other pertinent information

Then please call our Sales Department toll free at:

866-NUMRICH

(866-686-7424)

Outside U.S.A.

845-679-2417

Office Hours:

Monday through Friday
8:00 a.m. to 4:30 p.m. EST

M16 Upper Receiver & Barrel Assembly (*)

Schematic Image

*Part Key 'NI' stands for 'Not Illustrated'.

Image Part Key Product # Description Price Add To Cart
Handguard Cap, Triangular
13 204910B Handguard Cap, Triangular $4.00 Buy Now
Gas Tube Roll Pin
14 196060C Gas Tube Roll Pin $2.25 Buy Now
Gas Tube Assembly
15 196150D Gas Tube Assembly $15.90 Buy Now
Gas Tube, Early - Pre Vietnam, Used
15 1447670 Gas Tube, Early - Pre Vietnam, Used $39.95 Sold Out
Front Swivel Pin (Rivet)
16 551690A Front Swivel Pin (Rivet) $2.35 Buy Now
Front Swivel
17 551680D Front Swivel $2.35 Buy Now
Front Sight Post (Square, 4 Notch)
18 196890B Front Sight Post (Square, 4 Notch) $6.00 Buy Now
Front Sight, Round Post
18 204830B Front Sight, Round Post $5.55 Buy Now
Front Sight Detent
19 197010B Front Sight Detent $1.60 Buy Now
Front Sight Detent Spring
20 197030B Front Sight Detent Spring $1.60 Buy Now
Front Sight Base (w/ Bayonet Lug)
21 204840B Front Sight Base (w/ Bayonet Lug) $28.10 Buy Now
Barrel Assembly, 5.56/.223, 16", 1/9" Twist, 6-Groove Rifling
22 1287810B Barrel Assembly, 5.56/.223, 16", 1/9" Twist, 6-Groove Rifling $199.95 Buy Now
Barrel Assembly, Bushmaster, 5.56 Nato, 16", 1-9 Twist, M4 Contour, Chrome Lined
22 1434710 Barrel Assembly, Bushmaster, 5.56 Nato, 16", 1-9 Twist, M4 Contour, Chrome Lined $219.95 Buy Now
Barrel Assembly, HBAR, 5.56 x 45, 16", 1-9 Twist, Black Phosphate Finish
22 1432630B Barrel Assembly, HBAR, 5.56 x 45, 16", 1-9 Twist, Black Phosphate Finish $199.95 Buy Now
Barrel Assembly, HBAR, 7.62 x 39, 16", 1/10" Twist, 6-Groove Rifling
22 1287820B Barrel Assembly, HBAR, 7.62 x 39, 16", 1/10" Twist, 6-Groove Rifling $199.95 Buy Now
Barrel, 5.56 x 45, 7.5", 1-9 Twist, Black Phosphate Finish
22 1432600B Barrel, 5.56 x 45, 7.5", 1-9 Twist, Black Phosphate Finish $139.95 Buy Now
Barrel, M4 Contour, 5.56 x 45, 14-1/2", 1-7 Twist, In The White
22 1432610B Barrel, M4 Contour, 5.56 x 45, 14-1/2", 1-7 Twist, In The White $124.95 Buy Now
Barrel, M4 Contour, 5.56 x 45, 16", 1-9 Twist, Black Phosphate Finish
22 1432620B Barrel, M4 Contour, 5.56 x 45, 16", 1-9 Twist, Black Phosphate Finish $144.95 Buy Now
23 196160C Barrel Nut Assembly (Delta Ring Assembly) $39.85 Sold Out
Handguard Snap Ring
24 196180G Handguard Snap Ring $1.60 Buy Now