Early 90s Full Block Autococker Dimensions

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I try to measure exact lengths, widths, weights, threads and materials of parts being listed so customers can confidently purchase that old rusty nelspot screw, sheridan pump rod, autococker actuating arm or random barrel and know it’s the dimensions they need for their restoration project.

Navarone cocker Right side
Reverse side of Navarone cocker with K-C Bottomline Reg.

But what if there aren’t any references available to the length in the first place?  This is typically the case so when I get requests (and I don’t get side tracked I try and take measurements. 

This series of images shows a partial breakdown of an early 90s Autococker.  Although this is a Navarone series cocker it shares dimensions with other full block Autocockers from 91 about 1993-94.

pump rod measurement on full block autococker
The Pump rod is around 8 inches long.

The Pump rod length on all full bodied Autocockers including full block, slanted block, and standard 2k bodies is roughly 8 inches.  The rod being used as an example on top of this Navarone Autococker is 8 inches but 8 and 1/8 will also work.  As with most lengths on Autocockers, the length doesn’t have to be exactly, since you can thread most of the rods in more or less (but less threads can lead to striped threads!).

Pump rods are available at:
http://www.baccipaintball.com/parts/semi/autococker/pump-arm.html

4 inch cocking rod on a full block body
On a full block Autococker the cocking rod from the beginning of threads to the start of the knurled nut/cap on the end is roughtly 3 and 7/8s to 4 inches.

The length of the cocking rod is typically dependent on the style of back block. The full back block that was standard on most early 90s cockers (up until late 93-94 or so) is around 4 inches.  The length pictured on the Navarone Autoocker above is about 3 and 7/8s inches to the rocking rod bumper (that hits the back block) and 4 inches to the start of the retaining knurled nut on the end of the rod.  The length of the retaining nut isn’t significant, other than it can add more weight and possibly require more psi to cock and possibly strike harder resulting in a higher velocity if the weight is more.

Cocking rods are available here:
http://www.baccipaintball.com/parts/semi/autococker/autococker-cocking-rods.html

And Pre 2k Back Blocks are available here:
http://www.baccipaintball.com/parts/semi/autococker/back-blocks/pre-2k-back-block.html

bolt measurements on classic cocker.
Bolt measurement are 5 and 3/8s to the center of the bolt pin hole and about 5 and 7/8s to the knurled larger od portion.

The length of the bolt is standard for pre 2k non p-block autocockers at 5 and 7/8s to 6 inches. The bolt pin hole is at around 5 and 3/8ths at the center.

Autococker pre 2k bolts that will work on these bodies are available here:
http://www.baccipaintball.com/parts/semi/autococker/bolts/pre-2k-bolts.html

Stock sheridan spring length is 1.5 inches.
Early cockers used Sheridan main springs. Length of the mainspring is 1.5 inches stock.

Most early to mid 90s Autocockers (as well as sniper 1 and 2s) used Sheridan main springs.
Occasionally the IVG (internal velocity governor) is a different length but most 91 to 95 autocockers that use sheridan springs are standard and the length is about 1.5 inches. A slightly longer sheridan spring means more tension to recock and more force when the trigger is pulled resulting in a higher velocity.
Nelson spring kits require different lengths and will be covered in a later breakdown.

Sheridan main springs around 1.5 inches are available at:
http://www.baccipaintball.com/parts/pump/sheridan/sheridan-small-parts.html

The 3 way actuating arm length.
The 3 way actuating arm is about 2 and 7/8ths inches before the coupler.

The 3 way actuating arm on this early 90s Navarone Autococker is roughly 2 and 7/8ths inches from the bend/90 to the end of the threads.  The coupler is not included in this length. This is not the stock arm since the stock arm would have originally been unthreaded and slip fit blackened steel that locked down with a set screw (and quickly rusted).
The length of 2 and 7/8s to 3 should be about standard distance for most full bodied autocockers before 2k.  After 2k the vertical adapter adapters were occasionally drilled out more resulting in a coupler that could be further back. 

Autococker actuating arms are available at:
http://www.baccipaintball.com/parts/semi/autococker/3-way-actuating-arm.html

I hope this helps some Autococker enthusiasts piece back together their cockers and hopefully get them shooting. Below is a playlist with Tim at Paintballtek.com explaining the pieces of this particular Navarone Autococker. The second video in the playlist is Jorge Cervantez shooting this autococker before it was setup with the KC No Hot Shots bottomline reg assembly.

For more dimensions and specifications checkout:
http://www.baccipaintball.com/tech-autococker

2 COMMENTS

  1. I have a question about these LPRs. I have one so they act any better with compressed air? Or are they really that unreliable?

  2. From what I’ve heard they didn’t hold a constant pressure well and needed to be constantly adjusted. From most accounts I’ve heard they were the largest part of the 1991-1993 autocockers being largly un reliable.
    They are also a pain to have to service because the seal is contained between the body and the back 1/8th npt screw. So to disassemble. They are neat for novelty and if your restore an Autococker from that period but I wouldn’t want to rely on one.
    We cycle this autococker in this video:
    https://www.youtube.com/watch?v=95LyT5m-X7U

    Thanks,
    -Dan

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