Precision CNC Machining
As a service to a valued customer, David Coggin is helping Bob get the word out
on his new product
until he gets his own web page up and running.
AR-15 AR-10 Tikka
Now Available... AR-10 Match Length Bob Sled
New Through-the-Trigger Guard Bolt Release now Available
TGBR25 AR-15 Through-the-Trigger Guard Bolt Release.
Brownells sells the AR-15 Bob Sleds.
Sinclair International sells the AR-15 Bob Sleds.
Sells the Original Bob Sleds for AR-15, AR-10, and SR-25/DPMS-LR308
Sells the Original Bob Sled.
Champion's Choice Sells the Original Bob Sleds
Sells the Original Bob Sleds
Sells the Original Bob Sleds for AR-15
the Original Bob Sleds
Shooter Ready? Long Range Shooting Simulation Game & Custom Firearms.
Bob has designed the Original Bob Sled for AR-15 rifles. It is a magazine that holds no rounds. Its purpose is to allow the loading and firing a single rounds during competition, at the benchrest, or out varmint shooting. The OBS is machined from a single piece of Black DELRIN.
Here is how it works: The OBS is inserted instead of a magazine. The bolt is opened. The built in plunger on the OBS trips the bolt stop and holds the bolt open. A single round is then placed in the bolt port and allowed to rest in the channel of the OBS. The bolt release button is pressed and a single round is loaded. Once that round is fired, the action cycles normally and the OBS plunger trips the lever to hold the bolt open. This is a very smooth operation for slow fire.
The advantages of the Original Bob Sled are:
Operates and feels like a standard 20 round magazine.
The loading channel perfectly aligns the round to enter the chamber.
The plunger automatically activates the bolt stop.
The loading lip on the left side is chamfered to prevent a round from lodging on top of it.
Long rounds, that will not fit in a standard magazine, can be single loaded.
Delrin is unbreakable and does not scratch, mar or dent metal parts.
Excellent for testing new handloads.
Extra safety when teaching new shooters.
And... it saves ammo.
The advantages for Competition:
Keeps your AR-15 straight and level while single loading a round in slow-fire.
No need to destroy a "good" magazine to make a poor single loading magazine.
Excellent for standing and prone slow-fire competition.
No need to "break position" when locked down in prone to load a round.
Delrin is a very durable material and is not affected by gun
cleaning solvents. You can use a cloth and WD-40 to clean and shine the OBS.
Properties of Delrin
Delrin Material Data Sheet
David Coggin has machined a number of these AR-15 Original Bob Sleds.
Left side of the Original Bob Sled made from DELRIN
Rear view of the OBS showing the loading channel and the bolt stop plunger.
The OBS may be shortened to be flush with the magazine port by sawing it off at the "White Line".
Shortened models are also available.
Here is one of the shortened models.
The bolt-lock plunger is lubricated for life with "The Ultimate Weapons Lubricant" MILITEC®-1
Note: Looking from the rear of the magazine, the left lip is chamfered so a round will
not ride on top of it and cause a "Stove Pipe" jam with a live round.
Designed for the SR-25/DPMS-LR308
Stoner SR-25 Semi-Auto Rifles & DPMS Long Range .308 Semi-Auto Rifles
AR Carrier Hanging Up Rare, but here is some info on it.
Here is a view of the Original Bob Sled installed in an AR-15. Note the prototype Through-the-Trigger Guard
Bolt Release extension that will release the bolt by pushing the lever through the trigger guard. This is now
a production item.
The Through-the-Trigger Guard Bolt Release is now available.
Bolt Release Lever Installation instructions
LEAVE THE SCOTCH TAPE ATTACHED UNTIL FULLY INSTALLED.
Step 2 Drive the existing roll pin out aft to the buttstock, leaving 3/32 punch in place.
Drive New Pin and Lever WITH SCOTCH TAPE ATTACHED Forward until
The Tikka M595 (made by Sako) is a match grade hi-power
competition rifle. It is a bolt action that feeds from a single stack,
centerline feed magazine. The barrel is free-floated and the stock
comes with a hand stop rail as standard equipment.
Extra magazines are $60 each, so not having to purchase an extra magazine will more than offset the cost of the Original Bob Sled -TIKKA- Version.
The sled is made of white Delrin for safety, (easier to see when it is installed compared to the black base of the actual magazine) and will not scratch or damage your stock and is basically indestructible. The OBS shape matches the actual magazine and fits flush with the bottom of the stock. When the magazine release button is pushed , the Tikka OBS "pops out" using the same plunger as an original magazine.
The OBS -TIKKA- works in both .308 and .223 versions of this fine rifle.
Right side view of the Tikka OBS.
AR-10 Match Length Bob Sled
David Coggin has machined a number of these Original Bob Sled for the AR-15, AR-10, and Tikka rifles.
from 2003 CMP Competition Rules 7th edition.
U.S. Rifle, Caliber 5.56mm, M16
Modification to make automatic fire impossible
Magazines of the standard service 20 or 30
AR15.com Ammunition FAQ
The Competitive AR15
Order online stock Metals and Materials here
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