DIY Roller Speargun - Fitting a Roller Power Head

[@josehechavarria2003]

Good video, where can I buy the parts ?

[@NoobSpearoSpearfishing]

spearfishing.com.au/search?type=product&q=Mannysub use the code: NOOBSPEARO and save $20 for purchases over $200

[@DeepBlueSpirit2]

Nice video - so simple. Cool to share this. Pretension can be approx half barrel length + 10 centimeters. I used that as standard and works very nice for16mm bands.

[@valmirmuniz687]

Cheers. Not yet! I live in Brazil and rollers only on imports I'm going to convert my Rob Allen in a roller. Thanks for the video. Helped me a lot! Sorry for my English.

[@NoobSpearoSpearfishing]

Your English is very good amigos! Glad you found it helpful

[@Ashcooper117]

This was super informative and I finally understood how to achieve pretension after wanting to convert my rail gun to a roller. So I could use a set of scales to measure pretension back to the handle also?

[@NoobSpearoSpearfishing]

Hi Ash, cheers for watching:) I would just measure the total span from pretension point to loaded position. Ideal length is 300-350% stretch, so if that length is 1200mm for example, you could cut your bands somewhere around the 400mm mark. The instructions from Manny do all the legwork for you though and tell you exactly how long your bands should be so I would just use that. Failing that, Coatesman has an entire unrolling the roller series where he makes recommendations for this. Having the correct band diameter to shaft diameter is super important too. - Shrek

[@Danilorlsa]

Very Good! Congratulations!!!

[@ferdinandmanaois3608]

Good presentation sir, how much the muzzle roller only sir.

[@NoobSpearoSpearfishing]

Email Manny at rollerspearguns.com :) or check them out at spearfishing.com.au and use the code NOOBSPEARO to save $20 (if you spend more than $200AUD)

[@Gearsub]

Great video. I am a spearfisher myself. I have a vintage beuchat 100cm that I am planning to convert into a roller. These roller heads look like they are pretty universal and can fit into almost any conventional speargun dont they?

[@NoobSpearoSpearfishing]

Hey man, for sure. It does depend on the diameter of your barrel but check out the specs for each kit at rollerspeargun.com

[@Gearsub]

@@NoobSpearoSpearfishing hey man, what if the railing on the rube does not match with the roller muzzle? wont that affect the accuracy?

[@NoobSpearoSpearfishing]

@@Gearsub I'd imagine that it could slightly effect the flight of the shaft if it was deviating however the it's such a small part of the track it probably has minimal impact on trajectory. Talk to Emanuel for a more specific answer. Shrek

[@johnnyesleo]

This is great Shrek thanks a lot!

[@touravida3075]

Hey, Great tutorial. I'd like to do this with the new double roller setup they have. I know that you preordered the bands made, but where can you find out what length they should be if you want to use your own rubber. If you don't know that, can you tell me the thickness of the rubber and length you have on your 1.1? Good starting point. I can interpolate from there.

[@NoobSpearoSpearfishing]

Manny will tell you what rubber length he recommends when you contact him:) The red rubber he uses is excellent btw

[@DeepBlueSpirit2]

Rob Allen recommends approx 1/2 barrel length plus 10 centimeters for each rubber. I personally like the equation - works fine for me.

[@RoyceGetit]

Where did you get the anchor points?

[@vanuideas8286]

Thanks for the vid 👍

[@NorthernBorderBoys]

G'day when you cut the barrel doesn't that remove the rob allen bung thats in there ?? and does this affect the buoyancy of the speargun at all ? Cheers for the video mate it was super helpful

[@NoobSpearoSpearfishing]

Hey mate cheers for watching. Yes you will cut off the plug in the muzzle end from memory. However it doesn't matter as the Manny Sub conversion kit has it's own plug. That's why you must lubricate the "O" rings to get them in. As for buoyancy the gun is still perfect underwater and I've had no water incursion.

[@kyle3260]

Do you have to re plug the barrel if you cut it?

[@NoobSpearoSpearfishing]

Yes, if you cut below the existing plug. Most barrels are similar and I believe the conversion kit comes with a replacement

[@Mr.Mike361]

Do you think that with the drill in the trigger works that easy also with other trigger/handle ?

[@OrcaStalka]

Hi Micha, Manny sub provides instructions that cover conversions for other guns besides Rob Allen. I know of many other brands that have been converted.

[@delstep2255]

Can I fit this handle to a wooden barrel?

[@NoobSpearoSpearfishing]

G'day Del, you sure could but you'd need to mill the timber to fit a round tube

[@NoobSpearoSpearfishing]

Cheers Valmir, you into rollers?

[@valmirmuniz687]

Very good!

[@blakealexbale]

hey mate, what size power head should i order ? for a rob allen tuna

[@NoobSpearoSpearfishing]

www.rollerspearguns.com/product/roller-power-head-kit/

[@NoobSpearoSpearfishing]

Give Manny a call mate:) hope this helps

[@nicklausb]

Wouldn't it be more powerful (better) the longer it is?

[@NoobSpearoSpearfishing]

With roller technology you can have a shorter speargun with greater range due to the bands pulling (under tension) for longer! Sorry for the slow response

[@nicklausb]

Why did the gun need to be cut down (shortened)?

[@NoobSpearoSpearfishing]

Usually shorter roller guns and preferable due to increased range with greater travel. Read these blog posts for more information www.noobspearo.com/roller-power-head-conversion-first-impressions/ www.noobspearo.com/manny-sub-roller-power-head-conversion-part-2/ www.noobspearo.com/diy-roller-speargun/

[@keithwong7031]

Could I cut my gun down to any length?

[@NoobSpearoSpearfishing]

Theoretically you can cut them down to a very short length. You do need some Barrel though for band stretch - I wouldn't go smaller than 500mm but people do.

[@keithwong7031]

@@NoobSpearoSpearfishing oh sweet ! This means id need a spear shaft of appropriate length respective to the barrel?

[@NoobSpearoSpearfishing]

@@keithwong7031 100% roller gun makers love a shorter overhang on shafts though. I'm not completely sure why but I believe from a pure accuracy POV the less overhang provides less potential deviation in shaft flight. Ask guys like Chris Coates, Duncan Henderson, or Manny Bova

[@RICH_GAMING_AU]

hey where did u buy the premade rollers

[@NoobSpearoSpearfishing]

PelagicProductions direct from mannysub @ rollerspeargun.com it all comes in the Roller Conversion kit. www.noobspearo.com/the-vault-blog/roller-power-head-conversion-first-impressions/

[@RICH_GAMING_AU]

Ok thnx can u buy the rubbers premade from anywhere but

[@NoobSpearoSpearfishing]

Not sounding biased or anything but Mannysub rubbers are perfect for roller guns. Everything comes in the kit. If you do go elsewhere learn about progressive vs reactive types and choose wisely. Pre-tension is a big discussion as well - thankfully if you buy the Mannysub kit it provides the exact specs. If you are full DIY though check out Coatesmans blogpost on rollers as there's a bit to think about. Thanks for watching man and good luck

[@RICH_GAMING_AU]

wow thnx dude great to see you replying i really appreciate it

[@Mr.Mike361]

Why did you cut a part of the barrel ?

[@OrcaStalka]

Hi Micha, I cut the barrel down because I only wanted 1.1m Roller. 1.1m is quite a long roller and will be good for blue water and around the reef.

[@smailspearfishing6408]

Tanks for infomition like for you 👍

[@jcnedlic3374]

Adapter size please

[@NoobSpearoSpearfishing]

It depends on which barrel you are changing from. Email Mannysub for more info

[@pitbulltebra]

Ok but trigger plastic is ok??

[@NoobSpearoSpearfishing]

Yes! Super strong and lasts a long time. RA mechs are awesome